Home / 20,760.80-31,135.43-5,764.47

Finding the Fourth Proportional to 20,760.80, 31,135.43 and 5,764.47

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Solution

The fourth proportional to 20,760.80, 31,135.43 and 5,764.47 is: 8,645.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.80 : 31,135.43 = 5,764.47 : x
  2. Step 2: Convert to fraction form
    20,760.80/31,135.43 = 5,764.47/x
  3. Step 3: Cross multiply
    20,760.80x = 31,135.43 × 5,764.47
  4. Step 4: Simplify right side
    20,760.80x = 179,479,252.17
  5. Step 5: Solve for x
    x = 179,479,252.17/20,760.80
  6. Step 6: Final answer
    x = 8,645.10

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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.