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Finding the Fourth Proportional to 8,687.24, 13,008.62 and 4,787.32

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Solution

The fourth proportional to 8,687.24, 13,008.62 and 4,787.32 is: 7,168.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.24 : 13,008.62 = 4,787.32 : x
  2. Step 2: Convert to fraction form
    8,687.24/13,008.62 = 4,787.32/x
  3. Step 3: Cross multiply
    8,687.24x = 13,008.62 × 4,787.32
  4. Step 4: Simplify right side
    8,687.24x = 62,276,426.70
  5. Step 5: Solve for x
    x = 62,276,426.70/8,687.24
  6. Step 6: Final answer
    x = 7,168.72

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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.