Home / 20,139.18-30,177.72-10,780.44

Finding the Fourth Proportional to 20,139.18, 30,177.72 and 10,780.44

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Solution

The fourth proportional to 20,139.18, 30,177.72 and 10,780.44 is: 16,154.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.18 : 30,177.72 = 10,780.44 : x
  2. Step 2: Convert to fraction form
    20,139.18/30,177.72 = 10,780.44/x
  3. Step 3: Cross multiply
    20,139.18x = 30,177.72 × 10,780.44
  4. Step 4: Simplify right side
    20,139.18x = 325,329,099.80
  5. Step 5: Solve for x
    x = 325,329,099.80/20,139.18
  6. Step 6: Final answer
    x = 16,154.04

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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.