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Finding the Fourth Proportional to 18,824.38, 28,239.02 and 5,678.08

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Solution

The fourth proportional to 18,824.38, 28,239.02 and 5,678.08 is: 8,517.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,824.38 : 28,239.02 = 5,678.08 : x
  2. Step 2: Convert to fraction form
    18,824.38/28,239.02 = 5,678.08/x
  3. Step 3: Cross multiply
    18,824.38x = 28,239.02 × 5,678.08
  4. Step 4: Simplify right side
    18,824.38x = 160,343,414.68
  5. Step 5: Solve for x
    x = 160,343,414.68/18,824.38
  6. Step 6: Final answer
    x = 8,517.86

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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.