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Finding the Fourth Proportional to 20,191.92, 30,292.80 and 7,044.40

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Solution

The fourth proportional to 20,191.92, 30,292.80 and 7,044.40 is: 10,568.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.92 : 30,292.80 = 7,044.40 : x
  2. Step 2: Convert to fraction form
    20,191.92/30,292.80 = 7,044.40/x
  3. Step 3: Cross multiply
    20,191.92x = 30,292.80 × 7,044.40
  4. Step 4: Simplify right side
    20,191.92x = 213,394,600.32
  5. Step 5: Solve for x
    x = 213,394,600.32/20,191.92
  6. Step 6: Final answer
    x = 10,568.32

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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.