Home / 20,472.10-30,708.15-10,081.70

Finding the Fourth Proportional to 20,472.10, 30,708.15 and 10,081.70

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Solution

The fourth proportional to 20,472.10, 30,708.15 and 10,081.70 is: 15,122.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.10 : 30,708.15 = 10,081.70 : x
  2. Step 2: Convert to fraction form
    20,472.10/30,708.15 = 10,081.70/x
  3. Step 3: Cross multiply
    20,472.10x = 30,708.15 × 10,081.70
  4. Step 4: Simplify right side
    20,472.10x = 309,590,355.86
  5. Step 5: Solve for x
    x = 309,590,355.86/20,472.10
  6. Step 6: Final answer
    x = 15,122.55

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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.