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Finding the Fourth Proportional to 39,985.71, 59,978.85 and 15,031.41

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Solution

The fourth proportional to 39,985.71, 59,978.85 and 15,031.41 is: 22,547.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985.71 : 59,978.85 = 15,031.41 : x
  2. Step 2: Convert to fraction form
    39,985.71/59,978.85 = 15,031.41/x
  3. Step 3: Cross multiply
    39,985.71x = 59,978.85 × 15,031.41
  4. Step 4: Simplify right side
    39,985.71x = 901,566,685.68
  5. Step 5: Solve for x
    x = 901,566,685.68/39,985.71
  6. Step 6: Final answer
    x = 22,547.22

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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.