Home / 20,721.47-31,091.31-7,575.80

Finding the Fourth Proportional to 20,721.47, 31,091.31 and 7,575.80

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Solution

The fourth proportional to 20,721.47, 31,091.31 and 7,575.80 is: 11,367.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.47 : 31,091.31 = 7,575.80 : x
  2. Step 2: Convert to fraction form
    20,721.47/31,091.31 = 7,575.80/x
  3. Step 3: Cross multiply
    20,721.47x = 31,091.31 × 7,575.80
  4. Step 4: Simplify right side
    20,721.47x = 235,541,390.84
  5. Step 5: Solve for x
    x = 235,541,390.84/20,721.47
  6. Step 6: Final answer
    x = 11,367.02

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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.