Home / 20,139.88-30,147.45-17,150.52

Finding the Fourth Proportional to 20,139.88, 30,147.45 and 17,150.52

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Solution

The fourth proportional to 20,139.88, 30,147.45 and 17,150.52 is: 25,672.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.88 : 30,147.45 = 17,150.52 : x
  2. Step 2: Convert to fraction form
    20,139.88/30,147.45 = 17,150.52/x
  3. Step 3: Cross multiply
    20,139.88x = 30,147.45 × 17,150.52
  4. Step 4: Simplify right side
    20,139.88x = 517,044,571.11
  5. Step 5: Solve for x
    x = 517,044,571.11/20,139.88
  6. Step 6: Final answer
    x = 25,672.68

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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.