Home / 20,138.29-30,218.30-11,834.53

Finding the Fourth Proportional to 20,138.29, 30,218.30 and 11,834.53

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Solution

The fourth proportional to 20,138.29, 30,218.30 and 11,834.53 is: 17,758.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.29 : 30,218.30 = 11,834.53 : x
  2. Step 2: Convert to fraction form
    20,138.29/30,218.30 = 11,834.53/x
  3. Step 3: Cross multiply
    20,138.29x = 30,218.30 × 11,834.53
  4. Step 4: Simplify right side
    20,138.29x = 357,619,377.90
  5. Step 5: Solve for x
    x = 357,619,377.90/20,138.29
  6. Step 6: Final answer
    x = 17,758.18

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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.