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Finding the Fourth Proportional to 8,788.66, 12,131.87 and 5,251.21

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Solution

The fourth proportional to 8,788.66, 12,131.87 and 5,251.21 is: 7,248.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.66 : 12,131.87 = 5,251.21 : x
  2. Step 2: Convert to fraction form
    8,788.66/12,131.87 = 5,251.21/x
  3. Step 3: Cross multiply
    8,788.66x = 12,131.87 × 5,251.21
  4. Step 4: Simplify right side
    8,788.66x = 63,706,997.06
  5. Step 5: Solve for x
    x = 63,706,997.06/8,788.66
  6. Step 6: Final answer
    x = 7,248.77

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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.