Home / 20,321.40-28,042.65-11,367.21

Finding the Fourth Proportional to 20,321.40, 28,042.65 and 11,367.21

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Solution

The fourth proportional to 20,321.40, 28,042.65 and 11,367.21 is: 15,686.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.40 : 28,042.65 = 11,367.21 : x
  2. Step 2: Convert to fraction form
    20,321.40/28,042.65 = 11,367.21/x
  3. Step 3: Cross multiply
    20,321.40x = 28,042.65 × 11,367.21
  4. Step 4: Simplify right side
    20,321.40x = 318,766,691.51
  5. Step 5: Solve for x
    x = 318,766,691.51/20,321.40
  6. Step 6: Final answer
    x = 15,686.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.