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Finding the Fourth Proportional to 10,728.80, 16,093.20 and 8,869.86

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Solution

The fourth proportional to 10,728.80, 16,093.20 and 8,869.86 is: 13,304.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,728.80 : 16,093.20 = 8,869.86 : x
  2. Step 2: Convert to fraction form
    10,728.80/16,093.20 = 8,869.86/x
  3. Step 3: Cross multiply
    10,728.80x = 16,093.20 × 8,869.86
  4. Step 4: Simplify right side
    10,728.80x = 142,744,430.95
  5. Step 5: Solve for x
    x = 142,744,430.95/10,728.80
  6. Step 6: Final answer
    x = 13,304.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.