Home / 20,901.38-31,330.20-13,003.88

Finding the Fourth Proportional to 20,901.38, 31,330.20 and 13,003.88

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Solution

The fourth proportional to 20,901.38, 31,330.20 and 13,003.88 is: 19,492.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.38 : 31,330.20 = 13,003.88 : x
  2. Step 2: Convert to fraction form
    20,901.38/31,330.20 = 13,003.88/x
  3. Step 3: Cross multiply
    20,901.38x = 31,330.20 × 13,003.88
  4. Step 4: Simplify right side
    20,901.38x = 407,414,161.18
  5. Step 5: Solve for x
    x = 407,414,161.18/20,901.38
  6. Step 6: Final answer
    x = 19,492.21

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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.