Home / 20,708.20-31,067.12-5,917.32

Finding the Fourth Proportional to 20,708.20, 31,067.12 and 5,917.32

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Solution

The fourth proportional to 20,708.20, 31,067.12 and 5,917.32 is: 8,877.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.20 : 31,067.12 = 5,917.32 : x
  2. Step 2: Convert to fraction form
    20,708.20/31,067.12 = 5,917.32/x
  3. Step 3: Cross multiply
    20,708.20x = 31,067.12 × 5,917.32
  4. Step 4: Simplify right side
    20,708.20x = 183,834,090.52
  5. Step 5: Solve for x
    x = 183,834,090.52/20,708.20
  6. Step 6: Final answer
    x = 8,877.36

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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.