Home / 20,997.76-28,966.80-13,049.32

Finding the Fourth Proportional to 20,997.76, 28,966.80 and 13,049.32

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Solution

The fourth proportional to 20,997.76, 28,966.80 and 13,049.32 is: 18,001.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.76 : 28,966.80 = 13,049.32 : x
  2. Step 2: Convert to fraction form
    20,997.76/28,966.80 = 13,049.32/x
  3. Step 3: Cross multiply
    20,997.76x = 28,966.80 × 13,049.32
  4. Step 4: Simplify right side
    20,997.76x = 377,997,042.58
  5. Step 5: Solve for x
    x = 377,997,042.58/20,997.76
  6. Step 6: Final answer
    x = 18,001.78

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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.