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Finding the Fourth Proportional to 18,699.59, 28,049.15 and 5,372.90

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Solution

The fourth proportional to 18,699.59, 28,049.15 and 5,372.90 is: 8,059.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.59 : 28,049.15 = 5,372.90 : x
  2. Step 2: Convert to fraction form
    18,699.59/28,049.15 = 5,372.90/x
  3. Step 3: Cross multiply
    18,699.59x = 28,049.15 × 5,372.90
  4. Step 4: Simplify right side
    18,699.59x = 150,705,278.04
  5. Step 5: Solve for x
    x = 150,705,278.04/18,699.59
  6. Step 6: Final answer
    x = 8,059.28

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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.