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Finding the Fourth Proportional to 7,133, 9,843.58 and 3,989.19

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Solution

The fourth proportional to 7,133, 9,843.58 and 3,989.19 is: 5,505.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,133 : 9,843.58 = 3,989.19 : x
  2. Step 2: Convert to fraction form
    7,133/9,843.58 = 3,989.19/x
  3. Step 3: Cross multiply
    7,133x = 9,843.58 × 3,989.19
  4. Step 4: Simplify right side
    7,133x = 39,267,890.95
  5. Step 5: Solve for x
    x = 39,267,890.95/7,133
  6. Step 6: Final answer
    x = 5,505.10

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Half scale
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Double scale
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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.