Home / 20,001.21-30,020.66-10,147.56

Finding the Fourth Proportional to 20,001.21, 30,020.66 and 10,147.56

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Solution

The fourth proportional to 20,001.21, 30,020.66 and 10,147.56 is: 15,230.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,001.21 : 30,020.66 = 10,147.56 : x
  2. Step 2: Convert to fraction form
    20,001.21/30,020.66 = 10,147.56/x
  3. Step 3: Cross multiply
    20,001.21x = 30,020.66 × 10,147.56
  4. Step 4: Simplify right side
    20,001.21x = 304,636,397.85
  5. Step 5: Solve for x
    x = 304,636,397.85/20,001.21
  6. Step 6: Final answer
    x = 15,230.90

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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.