Home / 20,801.80-28,706.90-11,370.76

Finding the Fourth Proportional to 20,801.80, 28,706.90 and 11,370.76

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Solution

The fourth proportional to 20,801.80, 28,706.90 and 11,370.76 is: 15,691.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.80 : 28,706.90 = 11,370.76 : x
  2. Step 2: Convert to fraction form
    20,801.80/28,706.90 = 11,370.76/x
  3. Step 3: Cross multiply
    20,801.80x = 28,706.90 × 11,370.76
  4. Step 4: Simplify right side
    20,801.80x = 326,419,270.24
  5. Step 5: Solve for x
    x = 326,419,270.24/20,801.80
  6. Step 6: Final answer
    x = 15,691.88

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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.