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Finding the Fourth Proportional to 8,873.20, 13,229.33 and 8,642.35

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Solution

The fourth proportional to 8,873.20, 13,229.33 and 8,642.35 is: 12,885.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,873.20 : 13,229.33 = 8,642.35 : x
  2. Step 2: Convert to fraction form
    8,873.20/13,229.33 = 8,642.35/x
  3. Step 3: Cross multiply
    8,873.20x = 13,229.33 × 8,642.35
  4. Step 4: Simplify right side
    8,873.20x = 114,332,500.13
  5. Step 5: Solve for x
    x = 114,332,500.13/8,873.20
  6. Step 6: Final answer
    x = 12,885.15

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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.