Home / 20,219.46-30,179.49-18,972.87

Finding the Fourth Proportional to 20,219.46, 30,179.49 and 18,972.87

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Solution

The fourth proportional to 20,219.46, 30,179.49 and 18,972.87 is: 28,318.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219.46 : 30,179.49 = 18,972.87 : x
  2. Step 2: Convert to fraction form
    20,219.46/30,179.49 = 18,972.87/x
  3. Step 3: Cross multiply
    20,219.46x = 30,179.49 × 18,972.87
  4. Step 4: Simplify right side
    20,219.46x = 572,591,356.11
  5. Step 5: Solve for x
    x = 572,591,356.11/20,219.46
  6. Step 6: Final answer
    x = 28,318.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.