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Finding the Fourth Proportional to 20,766.10, 31,149.15 and 20,766.10

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Solution

The fourth proportional to 20,766.10, 31,149.15 and 20,766.10 is: 31,149.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.10 : 31,149.15 = 20,766.10 : x
  2. Step 2: Convert to fraction form
    20,766.10/31,149.15 = 20,766.10/x
  3. Step 3: Cross multiply
    20,766.10x = 31,149.15 × 20,766.10
  4. Step 4: Simplify right side
    20,766.10x = 646,846,363.82
  5. Step 5: Solve for x
    x = 646,846,363.82/20,766.10
  6. Step 6: Final answer
    x = 31,149.15

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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.