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Finding the Fourth Proportional to 39,294.60, 58,935.42 and 12,639.26

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Solution

The fourth proportional to 39,294.60, 58,935.42 and 12,639.26 is: 18,956.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,294.60 : 58,935.42 = 12,639.26 : x
  2. Step 2: Convert to fraction form
    39,294.60/58,935.42 = 12,639.26/x
  3. Step 3: Cross multiply
    39,294.60x = 58,935.42 × 12,639.26
  4. Step 4: Simplify right side
    39,294.60x = 744,899,801.91
  5. Step 5: Solve for x
    x = 744,899,801.91/39,294.60
  6. Step 6: Final answer
    x = 18,956.80

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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.