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Finding the Fourth Proportional to 18,722.53, 28,091.96 and 9,947.17

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Solution

The fourth proportional to 18,722.53, 28,091.96 and 9,947.17 is: 14,925.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.53 : 28,091.96 = 9,947.17 : x
  2. Step 2: Convert to fraction form
    18,722.53/28,091.96 = 9,947.17/x
  3. Step 3: Cross multiply
    18,722.53x = 28,091.96 × 9,947.17
  4. Step 4: Simplify right side
    18,722.53x = 279,435,311.56
  5. Step 5: Solve for x
    x = 279,435,311.56/18,722.53
  6. Step 6: Final answer
    x = 14,925.09

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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.