Home / 20,634.60-30,948.30-7,480.20

Finding the Fourth Proportional to 20,634.60, 30,948.30 and 7,480.20

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Solution

The fourth proportional to 20,634.60, 30,948.30 and 7,480.20 is: 11,218.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,634.60 : 30,948.30 = 7,480.20 : x
  2. Step 2: Convert to fraction form
    20,634.60/30,948.30 = 7,480.20/x
  3. Step 3: Cross multiply
    20,634.60x = 30,948.30 × 7,480.20
  4. Step 4: Simplify right side
    20,634.60x = 231,499,473.66
  5. Step 5: Solve for x
    x = 231,499,473.66/20,634.60
  6. Step 6: Final answer
    x = 11,218.99

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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.