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Finding the Fourth Proportional to 18,773.95, 28,139.46 and 8,899.24

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Solution

The fourth proportional to 18,773.95, 28,139.46 and 8,899.24 is: 13,338.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,773.95 : 28,139.46 = 8,899.24 : x
  2. Step 2: Convert to fraction form
    18,773.95/28,139.46 = 8,899.24/x
  3. Step 3: Cross multiply
    18,773.95x = 28,139.46 × 8,899.24
  4. Step 4: Simplify right side
    18,773.95x = 250,419,808.01
  5. Step 5: Solve for x
    x = 250,419,808.01/18,773.95
  6. Step 6: Final answer
    x = 13,338.69

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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.