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Finding the Fourth Proportional to 17,793.60, 26,690.40 and 15,387.90

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Solution

The fourth proportional to 17,793.60, 26,690.40 and 15,387.90 is: 23,081.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,793.60 : 26,690.40 = 15,387.90 : x
  2. Step 2: Convert to fraction form
    17,793.60/26,690.40 = 15,387.90/x
  3. Step 3: Cross multiply
    17,793.60x = 26,690.40 × 15,387.90
  4. Step 4: Simplify right side
    17,793.60x = 410,709,206.16
  5. Step 5: Solve for x
    x = 410,709,206.16/17,793.60
  6. Step 6: Final answer
    x = 23,081.85

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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.