Home / 15,042.11-20,760.40-9,377.78

Finding the Fourth Proportional to 15,042.11, 20,760.40 and 9,377.78

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Solution

The fourth proportional to 15,042.11, 20,760.40 and 9,377.78 is: 12,942.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,042.11 : 20,760.40 = 9,377.78 : x
  2. Step 2: Convert to fraction form
    15,042.11/20,760.40 = 9,377.78/x
  3. Step 3: Cross multiply
    15,042.11x = 20,760.40 × 9,377.78
  4. Step 4: Simplify right side
    15,042.11x = 194,686,371.83
  5. Step 5: Solve for x
    x = 194,686,371.83/15,042.11
  6. Step 6: Final answer
    x = 12,942.76

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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.