Home / 20,115.53-30,154.61-10,761.99

Finding the Fourth Proportional to 20,115.53, 30,154.61 and 10,761.99

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Solution

The fourth proportional to 20,115.53, 30,154.61 and 10,761.99 is: 16,132.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.53 : 30,154.61 = 10,761.99 : x
  2. Step 2: Convert to fraction form
    20,115.53/30,154.61 = 10,761.99/x
  3. Step 3: Cross multiply
    20,115.53x = 30,154.61 × 10,761.99
  4. Step 4: Simplify right side
    20,115.53x = 324,523,557.46
  5. Step 5: Solve for x
    x = 324,523,557.46/20,115.53
  6. Step 6: Final answer
    x = 16,132.99

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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.