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Finding the Fourth Proportional to 28,713.23, 43,069.84 and 8,991.89

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Solution

The fourth proportional to 28,713.23, 43,069.84 and 8,991.89 is: 13,487.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,713.23 : 43,069.84 = 8,991.89 : x
  2. Step 2: Convert to fraction form
    28,713.23/43,069.84 = 8,991.89/x
  3. Step 3: Cross multiply
    28,713.23x = 43,069.84 × 8,991.89
  4. Step 4: Simplify right side
    28,713.23x = 387,279,003.29
  5. Step 5: Solve for x
    x = 387,279,003.29/28,713.23
  6. Step 6: Final answer
    x = 13,487.83

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Similar ratio
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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.