Home / 10,489.38-15,729.21-3,910.83

Finding the Fourth Proportional to 10,489.38, 15,729.21 and 3,910.83

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Solution

The fourth proportional to 10,489.38, 15,729.21 and 3,910.83 is: 5,864.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,489.38 : 15,729.21 = 3,910.83 : x
  2. Step 2: Convert to fraction form
    10,489.38/15,729.21 = 3,910.83/x
  3. Step 3: Cross multiply
    10,489.38x = 15,729.21 × 3,910.83
  4. Step 4: Simplify right side
    10,489.38x = 61,514,266.34
  5. Step 5: Solve for x
    x = 61,514,266.34/10,489.38
  6. Step 6: Final answer
    x = 5,864.43

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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.