Home / 20,808.20-31,212.30-17,697.80

Finding the Fourth Proportional to 20,808.20, 31,212.30 and 17,697.80

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Solution

The fourth proportional to 20,808.20, 31,212.30 and 17,697.80 is: 26,546.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.20 : 31,212.30 = 17,697.80 : x
  2. Step 2: Convert to fraction form
    20,808.20/31,212.30 = 17,697.80/x
  3. Step 3: Cross multiply
    20,808.20x = 31,212.30 × 17,697.80
  4. Step 4: Simplify right side
    20,808.20x = 552,389,042.94
  5. Step 5: Solve for x
    x = 552,389,042.94/20,808.20
  6. Step 6: Final answer
    x = 26,546.70

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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.