Home / 20,147.40-30,191.52-10,138.38

Finding the Fourth Proportional to 20,147.40, 30,191.52 and 10,138.38

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Solution

The fourth proportional to 20,147.40, 30,191.52 and 10,138.38 is: 15,192.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.40 : 30,191.52 = 10,138.38 : x
  2. Step 2: Convert to fraction form
    20,147.40/30,191.52 = 10,138.38/x
  3. Step 3: Cross multiply
    20,147.40x = 30,191.52 × 10,138.38
  4. Step 4: Simplify right side
    20,147.40x = 306,093,102.54
  5. Step 5: Solve for x
    x = 306,093,102.54/20,147.40
  6. Step 6: Final answer
    x = 15,192.69

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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.