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Finding the Fourth Proportional to 18,899.28, 28,355.32 and 8,367.84

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Solution

The fourth proportional to 18,899.28, 28,355.32 and 8,367.84 is: 12,554.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,899.28 : 28,355.32 = 8,367.84 : x
  2. Step 2: Convert to fraction form
    18,899.28/28,355.32 = 8,367.84/x
  3. Step 3: Cross multiply
    18,899.28x = 28,355.32 × 8,367.84
  4. Step 4: Simplify right side
    18,899.28x = 237,272,780.91
  5. Step 5: Solve for x
    x = 237,272,780.91/18,899.28
  6. Step 6: Final answer
    x = 12,554.59

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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.