Home / 20,331.90-28,057.86-11,380.23

Finding the Fourth Proportional to 20,331.90, 28,057.86 and 11,380.23

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Solution

The fourth proportional to 20,331.90, 28,057.86 and 11,380.23 is: 15,704.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.90 : 28,057.86 = 11,380.23 : x
  2. Step 2: Convert to fraction form
    20,331.90/28,057.86 = 11,380.23/x
  3. Step 3: Cross multiply
    20,331.90x = 28,057.86 × 11,380.23
  4. Step 4: Simplify right side
    20,331.90x = 319,304,900.11
  5. Step 5: Solve for x
    x = 319,304,900.11/20,331.90
  6. Step 6: Final answer
    x = 15,704.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.