Home / 20,124.31-30,147.20-13,177.75

Finding the Fourth Proportional to 20,124.31, 30,147.20 and 13,177.75

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Solution

The fourth proportional to 20,124.31, 30,147.20 and 13,177.75 is: 19,740.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,124.31 : 30,147.20 = 13,177.75 : x
  2. Step 2: Convert to fraction form
    20,124.31/30,147.20 = 13,177.75/x
  3. Step 3: Cross multiply
    20,124.31x = 30,147.20 × 13,177.75
  4. Step 4: Simplify right side
    20,124.31x = 397,272,198.91
  5. Step 5: Solve for x
    x = 397,272,198.91/20,124.31
  6. Step 6: Final answer
    x = 19,740.91

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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.