Home / 20,320.14-28,042.85-11,367.79

Finding the Fourth Proportional to 20,320.14, 28,042.85 and 11,367.79

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Solution

The fourth proportional to 20,320.14, 28,042.85 and 11,367.79 is: 15,688.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.14 : 28,042.85 = 11,367.79 : x
  2. Step 2: Convert to fraction form
    20,320.14/28,042.85 = 11,367.79/x
  3. Step 3: Cross multiply
    20,320.14x = 28,042.85 × 11,367.79
  4. Step 4: Simplify right side
    20,320.14x = 318,785,229.80
  5. Step 5: Solve for x
    x = 318,785,229.80/20,320.14
  6. Step 6: Final answer
    x = 15,688.14

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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.