Home / 20,819.90-31,244.97-8,171.48

Finding the Fourth Proportional to 20,819.90, 31,244.97 and 8,171.48

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Solution

The fourth proportional to 20,819.90, 31,244.97 and 8,171.48 is: 12,263.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.90 : 31,244.97 = 8,171.48 : x
  2. Step 2: Convert to fraction form
    20,819.90/31,244.97 = 8,171.48/x
  3. Step 3: Cross multiply
    20,819.90x = 31,244.97 × 8,171.48
  4. Step 4: Simplify right side
    20,819.90x = 255,317,647.46
  5. Step 5: Solve for x
    x = 255,317,647.46/20,819.90
  6. Step 6: Final answer
    x = 12,263.15

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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.