Home / 20,766.60-31,149.90-12,472.20

Finding the Fourth Proportional to 20,766.60, 31,149.90 and 12,472.20

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Solution

The fourth proportional to 20,766.60, 31,149.90 and 12,472.20 is: 18,708.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.60 : 31,149.90 = 12,472.20 : x
  2. Step 2: Convert to fraction form
    20,766.60/31,149.90 = 12,472.20/x
  3. Step 3: Cross multiply
    20,766.60x = 31,149.90 × 12,472.20
  4. Step 4: Simplify right side
    20,766.60x = 388,507,782.78
  5. Step 5: Solve for x
    x = 388,507,782.78/20,766.60
  6. Step 6: Final answer
    x = 18,708.30

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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.