Home / 20,801.11-31,207.13-7,475.45

Finding the Fourth Proportional to 20,801.11, 31,207.13 and 7,475.45

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Solution

The fourth proportional to 20,801.11, 31,207.13 and 7,475.45 is: 11,215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.11 : 31,207.13 = 7,475.45 : x
  2. Step 2: Convert to fraction form
    20,801.11/31,207.13 = 7,475.45/x
  3. Step 3: Cross multiply
    20,801.11x = 31,207.13 × 7,475.45
  4. Step 4: Simplify right side
    20,801.11x = 233,287,202.61
  5. Step 5: Solve for x
    x = 233,287,202.61/20,801.11
  6. Step 6: Final answer
    x = 11,215.13

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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.