Home / 20,321.47-28,042.32-11,367.43

Finding the Fourth Proportional to 20,321.47, 28,042.32 and 11,367.43

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Solution

The fourth proportional to 20,321.47, 28,042.32 and 11,367.43 is: 15,686.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.47 : 28,042.32 = 11,367.43 : x
  2. Step 2: Convert to fraction form
    20,321.47/28,042.32 = 11,367.43/x
  3. Step 3: Cross multiply
    20,321.47x = 28,042.32 × 11,367.43
  4. Step 4: Simplify right side
    20,321.47x = 318,769,109.64
  5. Step 5: Solve for x
    x = 318,769,109.64/20,321.47
  6. Step 6: Final answer
    x = 15,686.32

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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.