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Finding the Fourth Proportional to 39,706.31, 54,792.23 and 21,801.20

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Solution

The fourth proportional to 39,706.31, 54,792.23 and 21,801.20 is: 30,084.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,706.31 : 54,792.23 = 21,801.20 : x
  2. Step 2: Convert to fraction form
    39,706.31/54,792.23 = 21,801.20/x
  3. Step 3: Cross multiply
    39,706.31x = 54,792.23 × 21,801.20
  4. Step 4: Simplify right side
    39,706.31x = 1,194,536,255.67
  5. Step 5: Solve for x
    x = 1,194,536,255.67/39,706.31
  6. Step 6: Final answer
    x = 30,084.29

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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.