Home / 20,708.80-31,067.20-8,862.40

Finding the Fourth Proportional to 20,708.80, 31,067.20 and 8,862.40

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Solution

The fourth proportional to 20,708.80, 31,067.20 and 8,862.40 is: 13,295.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.80 : 31,067.20 = 8,862.40 : x
  2. Step 2: Convert to fraction form
    20,708.80/31,067.20 = 8,862.40/x
  3. Step 3: Cross multiply
    20,708.80x = 31,067.20 × 8,862.40
  4. Step 4: Simplify right side
    20,708.80x = 275,329,953.28
  5. Step 5: Solve for x
    x = 275,329,953.28/20,708.80
  6. Step 6: Final answer
    x = 13,295.31

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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.