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Finding the Fourth Proportional to 18,882.62, 28,323.93 and 8,991.91

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Solution

The fourth proportional to 18,882.62, 28,323.93 and 8,991.91 is: 13,487.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,882.62 : 28,323.93 = 8,991.91 : x
  2. Step 2: Convert to fraction form
    18,882.62/28,323.93 = 8,991.91/x
  3. Step 3: Cross multiply
    18,882.62x = 28,323.93 × 8,991.91
  4. Step 4: Simplify right side
    18,882.62x = 254,686,229.41
  5. Step 5: Solve for x
    x = 254,686,229.41/18,882.62
  6. Step 6: Final answer
    x = 13,487.87

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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.