Home / 20,138.53-30,182.28-11,378.38

Finding the Fourth Proportional to 20,138.53, 30,182.28 and 11,378.38

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Solution

The fourth proportional to 20,138.53, 30,182.28 and 11,378.38 is: 17,053.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.53 : 30,182.28 = 11,378.38 : x
  2. Step 2: Convert to fraction form
    20,138.53/30,182.28 = 11,378.38/x
  3. Step 3: Cross multiply
    20,138.53x = 30,182.28 × 11,378.38
  4. Step 4: Simplify right side
    20,138.53x = 343,425,451.11
  5. Step 5: Solve for x
    x = 343,425,451.11/20,138.53
  6. Step 6: Final answer
    x = 17,053.15

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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.