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Finding the Fourth Proportional to 40,938.60, 61,407.90 and 14,644.20

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Solution

The fourth proportional to 40,938.60, 61,407.90 and 14,644.20 is: 21,966.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,938.60 : 61,407.90 = 14,644.20 : x
  2. Step 2: Convert to fraction form
    40,938.60/61,407.90 = 14,644.20/x
  3. Step 3: Cross multiply
    40,938.60x = 61,407.90 × 14,644.20
  4. Step 4: Simplify right side
    40,938.60x = 899,269,569.18
  5. Step 5: Solve for x
    x = 899,269,569.18/40,938.60
  6. Step 6: Final answer
    x = 21,966.30

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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.