Home / 20,338.68-28,065.42-11,385.48

Finding the Fourth Proportional to 20,338.68, 28,065.42 and 11,385.48

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Solution

The fourth proportional to 20,338.68, 28,065.42 and 11,385.48 is: 15,710.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,338.68 : 28,065.42 = 11,385.48 : x
  2. Step 2: Convert to fraction form
    20,338.68/28,065.42 = 11,385.48/x
  3. Step 3: Cross multiply
    20,338.68x = 28,065.42 × 11,385.48
  4. Step 4: Simplify right side
    20,338.68x = 319,538,278.10
  5. Step 5: Solve for x
    x = 319,538,278.10/20,338.68
  6. Step 6: Final answer
    x = 15,710.87

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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.