Home / 20,806.20-31,209.30-8,332.20

Finding the Fourth Proportional to 20,806.20, 31,209.30 and 8,332.20

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Solution

The fourth proportional to 20,806.20, 31,209.30 and 8,332.20 is: 12,498.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.20 : 31,209.30 = 8,332.20 : x
  2. Step 2: Convert to fraction form
    20,806.20/31,209.30 = 8,332.20/x
  3. Step 3: Cross multiply
    20,806.20x = 31,209.30 × 8,332.20
  4. Step 4: Simplify right side
    20,806.20x = 260,042,129.46
  5. Step 5: Solve for x
    x = 260,042,129.46/20,806.20
  6. Step 6: Final answer
    x = 12,498.30

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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.