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Finding the Fourth Proportional to 8,931.94, 13,398.52 and 2,691.40

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Solution

The fourth proportional to 8,931.94, 13,398.52 and 2,691.40 is: 4,037.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.94 : 13,398.52 = 2,691.40 : x
  2. Step 2: Convert to fraction form
    8,931.94/13,398.52 = 2,691.40/x
  3. Step 3: Cross multiply
    8,931.94x = 13,398.52 × 2,691.40
  4. Step 4: Simplify right side
    8,931.94x = 36,060,776.73
  5. Step 5: Solve for x
    x = 36,060,776.73/8,931.94
  6. Step 6: Final answer
    x = 4,037.28

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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.