Home / 20,139.20-30,194.40-9,036.80

Finding the Fourth Proportional to 20,139.20, 30,194.40 and 9,036.80

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Solution

The fourth proportional to 20,139.20, 30,194.40 and 9,036.80 is: 13,548.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.20 : 30,194.40 = 9,036.80 : x
  2. Step 2: Convert to fraction form
    20,139.20/30,194.40 = 9,036.80/x
  3. Step 3: Cross multiply
    20,139.20x = 30,194.40 × 9,036.80
  4. Step 4: Simplify right side
    20,139.20x = 272,860,753.92
  5. Step 5: Solve for x
    x = 272,860,753.92/20,139.20
  6. Step 6: Final answer
    x = 13,548.74

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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.