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Finding the Fourth Proportional to 12,699.99, 17,520.15 and 8,225.19

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Solution

The fourth proportional to 12,699.99, 17,520.15 and 8,225.19 is: 11,346.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.99 : 17,520.15 = 8,225.19 : x
  2. Step 2: Convert to fraction form
    12,699.99/17,520.15 = 8,225.19/x
  3. Step 3: Cross multiply
    12,699.99x = 17,520.15 × 8,225.19
  4. Step 4: Simplify right side
    12,699.99x = 144,106,562.58
  5. Step 5: Solve for x
    x = 144,106,562.58/12,699.99
  6. Step 6: Final answer
    x = 11,346.98

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Half scale
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Double scale
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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.