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Finding the Fourth Proportional to 10,687.03, 16,103.49 and 8,781.91

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Solution

The fourth proportional to 10,687.03, 16,103.49 and 8,781.91 is: 13,232.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,687.03 : 16,103.49 = 8,781.91 : x
  2. Step 2: Convert to fraction form
    10,687.03/16,103.49 = 8,781.91/x
  3. Step 3: Cross multiply
    10,687.03x = 16,103.49 × 8,781.91
  4. Step 4: Simplify right side
    10,687.03x = 141,419,421.82
  5. Step 5: Solve for x
    x = 141,419,421.82/10,687.03
  6. Step 6: Final answer
    x = 13,232.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.