Home / 20,213.76-30,319.38-9,115.92

Finding the Fourth Proportional to 20,213.76, 30,319.38 and 9,115.92

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Solution

The fourth proportional to 20,213.76, 30,319.38 and 9,115.92 is: 13,673.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,213.76 : 30,319.38 = 9,115.92 : x
  2. Step 2: Convert to fraction form
    20,213.76/30,319.38 = 9,115.92/x
  3. Step 3: Cross multiply
    20,213.76x = 30,319.38 × 9,115.92
  4. Step 4: Simplify right side
    20,213.76x = 276,389,042.53
  5. Step 5: Solve for x
    x = 276,389,042.53/20,213.76
  6. Step 6: Final answer
    x = 13,673.31

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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.