Home / 20,731.32-28,542.60-18,451.80

Finding the Fourth Proportional to 20,731.32, 28,542.60 and 18,451.80

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Solution

The fourth proportional to 20,731.32, 28,542.60 and 18,451.80 is: 25,404.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.32 : 28,542.60 = 18,451.80 : x
  2. Step 2: Convert to fraction form
    20,731.32/28,542.60 = 18,451.80/x
  3. Step 3: Cross multiply
    20,731.32x = 28,542.60 × 18,451.80
  4. Step 4: Simplify right side
    20,731.32x = 526,662,346.68
  5. Step 5: Solve for x
    x = 526,662,346.68/20,731.32
  6. Step 6: Final answer
    x = 25,404.19

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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.