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Finding the Fourth Proportional to 39,173.59, 58,785.14 and 20,487.16

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Solution

The fourth proportional to 39,173.59, 58,785.14 and 20,487.16 is: 30,743.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,173.59 : 58,785.14 = 20,487.16 : x
  2. Step 2: Convert to fraction form
    39,173.59/58,785.14 = 20,487.16/x
  3. Step 3: Cross multiply
    39,173.59x = 58,785.14 × 20,487.16
  4. Step 4: Simplify right side
    39,173.59x = 1,204,340,568.80
  5. Step 5: Solve for x
    x = 1,204,340,568.80/39,173.59
  6. Step 6: Final answer
    x = 30,743.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.