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Finding the Fourth Proportional to 8,987.75, 12,402.92 and 5,008.77

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Solution

The fourth proportional to 8,987.75, 12,402.92 and 5,008.77 is: 6,912.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.75 : 12,402.92 = 5,008.77 : x
  2. Step 2: Convert to fraction form
    8,987.75/12,402.92 = 5,008.77/x
  3. Step 3: Cross multiply
    8,987.75x = 12,402.92 × 5,008.77
  4. Step 4: Simplify right side
    8,987.75x = 62,123,348.56
  5. Step 5: Solve for x
    x = 62,123,348.56/8,987.75
  6. Step 6: Final answer
    x = 6,912.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.