Home / 20,128.72-30,193.08-6,981.10

Finding the Fourth Proportional to 20,128.72, 30,193.08 and 6,981.10

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Solution

The fourth proportional to 20,128.72, 30,193.08 and 6,981.10 is: 10,471.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.72 : 30,193.08 = 6,981.10 : x
  2. Step 2: Convert to fraction form
    20,128.72/30,193.08 = 6,981.10/x
  3. Step 3: Cross multiply
    20,128.72x = 30,193.08 × 6,981.10
  4. Step 4: Simplify right side
    20,128.72x = 210,780,910.79
  5. Step 5: Solve for x
    x = 210,780,910.79/20,128.72
  6. Step 6: Final answer
    x = 10,471.65

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Similar ratio
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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.