Home / 20,766.60-28,655.46-11,691.72

Finding the Fourth Proportional to 20,766.60, 28,655.46 and 11,691.72

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Solution

The fourth proportional to 20,766.60, 28,655.46 and 11,691.72 is: 16,133.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,766.60 : 28,655.46 = 11,691.72 : x
  2. Step 2: Convert to fraction form
    20,766.60/28,655.46 = 11,691.72/x
  3. Step 3: Cross multiply
    20,766.60x = 28,655.46 × 11,691.72
  4. Step 4: Simplify right side
    20,766.60x = 335,031,614.79
  5. Step 5: Solve for x
    x = 335,031,614.79/20,766.60
  6. Step 6: Final answer
    x = 16,133.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.