Home / 20,808.77-31,176.82-17,321.20

Finding the Fourth Proportional to 20,808.77, 31,176.82 and 17,321.20

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Solution

The fourth proportional to 20,808.77, 31,176.82 and 17,321.20 is: 25,951.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.77 : 31,176.82 = 17,321.20 : x
  2. Step 2: Convert to fraction form
    20,808.77/31,176.82 = 17,321.20/x
  3. Step 3: Cross multiply
    20,808.77x = 31,176.82 × 17,321.20
  4. Step 4: Simplify right side
    20,808.77x = 540,019,934.58
  5. Step 5: Solve for x
    x = 540,019,934.58/20,808.77
  6. Step 6: Final answer
    x = 25,951.55

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1.5x scale

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.