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Finding the Fourth Proportional to 26,915.20, 40,372.80 and 15,251.20

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Solution

The fourth proportional to 26,915.20, 40,372.80 and 15,251.20 is: 22,876.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,915.20 : 40,372.80 = 15,251.20 : x
  2. Step 2: Convert to fraction form
    26,915.20/40,372.80 = 15,251.20/x
  3. Step 3: Cross multiply
    26,915.20x = 40,372.80 × 15,251.20
  4. Step 4: Simplify right side
    26,915.20x = 615,733,647.36
  5. Step 5: Solve for x
    x = 615,733,647.36/26,915.20
  6. Step 6: Final answer
    x = 22,876.80

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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.