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Finding the Fourth Proportional to 8,872.20, 13,227.84 and 8,641.35

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Solution

The fourth proportional to 8,872.20, 13,227.84 and 8,641.35 is: 12,883.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,872.20 : 13,227.84 = 8,641.35 : x
  2. Step 2: Convert to fraction form
    8,872.20/13,227.84 = 8,641.35/x
  3. Step 3: Cross multiply
    8,872.20x = 13,227.84 × 8,641.35
  4. Step 4: Simplify right side
    8,872.20x = 114,306,395.18
  5. Step 5: Solve for x
    x = 114,306,395.18/8,872.20
  6. Step 6: Final answer
    x = 12,883.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.