Home / 20,143.11-30,217.23-11,713.53

Finding the Fourth Proportional to 20,143.11, 30,217.23 and 11,713.53

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Solution

The fourth proportional to 20,143.11, 30,217.23 and 11,713.53 is: 17,571.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.11 : 30,217.23 = 11,713.53 : x
  2. Step 2: Convert to fraction form
    20,143.11/30,217.23 = 11,713.53/x
  3. Step 3: Cross multiply
    20,143.11x = 30,217.23 × 11,713.53
  4. Step 4: Simplify right side
    20,143.11x = 353,950,430.12
  5. Step 5: Solve for x
    x = 353,950,430.12/20,143.11
  6. Step 6: Final answer
    x = 17,571.79

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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.