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Finding the Fourth Proportional to 8,605.99, 11,871.75 and 7,105.15

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Solution

The fourth proportional to 8,605.99, 11,871.75 and 7,105.15 is: 9,801.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.99 : 11,871.75 = 7,105.15 : x
  2. Step 2: Convert to fraction form
    8,605.99/11,871.75 = 7,105.15/x
  3. Step 3: Cross multiply
    8,605.99x = 11,871.75 × 7,105.15
  4. Step 4: Simplify right side
    8,605.99x = 84,350,564.51
  5. Step 5: Solve for x
    x = 84,350,564.51/8,605.99
  6. Step 6: Final answer
    x = 9,801.38

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Find fourth proportional to 4,303.00, 5,935.88 and 3,552.58
Half scale
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Double scale
Find fourth proportional to 8,606.99, 11,873.13 and 7,106.15
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.