Home / 20,662.20-31,001.40-7,515.90

Finding the Fourth Proportional to 20,662.20, 31,001.40 and 7,515.90

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Solution

The fourth proportional to 20,662.20, 31,001.40 and 7,515.90 is: 11,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.20 : 31,001.40 = 7,515.90 : x
  2. Step 2: Convert to fraction form
    20,662.20/31,001.40 = 7,515.90/x
  3. Step 3: Cross multiply
    20,662.20x = 31,001.40 × 7,515.90
  4. Step 4: Simplify right side
    20,662.20x = 233,003,422.26
  5. Step 5: Solve for x
    x = 233,003,422.26/20,662.20
  6. Step 6: Final answer
    x = 11,276.80

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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.