Home / 20,945.68-31,418.24-5,150.85

Finding the Fourth Proportional to 20,945.68, 31,418.24 and 5,150.85

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Solution

The fourth proportional to 20,945.68, 31,418.24 and 5,150.85 is: 7,726.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.68 : 31,418.24 = 5,150.85 : x
  2. Step 2: Convert to fraction form
    20,945.68/31,418.24 = 5,150.85/x
  3. Step 3: Cross multiply
    20,945.68x = 31,418.24 × 5,150.85
  4. Step 4: Simplify right side
    20,945.68x = 161,830,484.41
  5. Step 5: Solve for x
    x = 161,830,484.41/20,945.68
  6. Step 6: Final answer
    x = 7,726.20

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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.