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Finding the Fourth Proportional to 18,853.68, 28,278.69 and 9,489.97

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Solution

The fourth proportional to 18,853.68, 28,278.69 and 9,489.97 is: 14,234.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,853.68 : 28,278.69 = 9,489.97 : x
  2. Step 2: Convert to fraction form
    18,853.68/28,278.69 = 9,489.97/x
  3. Step 3: Cross multiply
    18,853.68x = 28,278.69 × 9,489.97
  4. Step 4: Simplify right side
    18,853.68x = 268,363,919.74
  5. Step 5: Solve for x
    x = 268,363,919.74/18,853.68
  6. Step 6: Final answer
    x = 14,234.03

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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.