Home / 20,143.40-30,215.10-10,301.90

Finding the Fourth Proportional to 20,143.40, 30,215.10 and 10,301.90

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Solution

The fourth proportional to 20,143.40, 30,215.10 and 10,301.90 is: 15,452.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.40 : 30,215.10 = 10,301.90 : x
  2. Step 2: Convert to fraction form
    20,143.40/30,215.10 = 10,301.90/x
  3. Step 3: Cross multiply
    20,143.40x = 30,215.10 × 10,301.90
  4. Step 4: Simplify right side
    20,143.40x = 311,272,938.69
  5. Step 5: Solve for x
    x = 311,272,938.69/20,143.40
  6. Step 6: Final answer
    x = 15,452.85

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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.