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Finding the Fourth Proportional to 39,302.55, 58,978.13 and 15,929.19

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Solution

The fourth proportional to 39,302.55, 58,978.13 and 15,929.19 is: 23,903.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,302.55 : 58,978.13 = 15,929.19 : x
  2. Step 2: Convert to fraction form
    39,302.55/58,978.13 = 15,929.19/x
  3. Step 3: Cross multiply
    39,302.55x = 58,978.13 × 15,929.19
  4. Step 4: Simplify right side
    39,302.55x = 939,473,758.97
  5. Step 5: Solve for x
    x = 939,473,758.97/39,302.55
  6. Step 6: Final answer
    x = 23,903.63

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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.