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Finding the Fourth Proportional to 8,761.28, 13,141.92 and 4,374.32

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Solution

The fourth proportional to 8,761.28, 13,141.92 and 4,374.32 is: 6,561.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.28 : 13,141.92 = 4,374.32 : x
  2. Step 2: Convert to fraction form
    8,761.28/13,141.92 = 4,374.32/x
  3. Step 3: Cross multiply
    8,761.28x = 13,141.92 × 4,374.32
  4. Step 4: Simplify right side
    8,761.28x = 57,486,963.49
  5. Step 5: Solve for x
    x = 57,486,963.49/8,761.28
  6. Step 6: Final answer
    x = 6,561.48

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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.