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Finding the Fourth Proportional to 26,931.20, 40,396.80 and 15,236.48

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Solution

The fourth proportional to 26,931.20, 40,396.80 and 15,236.48 is: 22,854.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,931.20 : 40,396.80 = 15,236.48 : x
  2. Step 2: Convert to fraction form
    26,931.20/40,396.80 = 15,236.48/x
  3. Step 3: Cross multiply
    26,931.20x = 40,396.80 × 15,236.48
  4. Step 4: Simplify right side
    26,931.20x = 615,505,035.26
  5. Step 5: Solve for x
    x = 615,505,035.26/26,931.20
  6. Step 6: Final answer
    x = 22,854.72

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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.