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Finding the Fourth Proportional to 40,361.28, 60,506.40 and 15,720

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Solution

The fourth proportional to 40,361.28, 60,506.40 and 15,720 is: 23,566.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,361.28 : 60,506.40 = 15,720 : x
  2. Step 2: Convert to fraction form
    40,361.28/60,506.40 = 15,720/x
  3. Step 3: Cross multiply
    40,361.28x = 60,506.40 × 15,720
  4. Step 4: Simplify right side
    40,361.28x = 951,160,608
  5. Step 5: Solve for x
    x = 951,160,608/40,361.28
  6. Step 6: Final answer
    x = 23,566.17

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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.