Home / 8,141.20-12,209.88-3,521.68

Finding the Fourth Proportional to 8,141.20, 12,209.88 and 3,521.68

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Solution

The fourth proportional to 8,141.20, 12,209.88 and 3,521.68 is: 5,281.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,141.20 : 12,209.88 = 3,521.68 : x
  2. Step 2: Convert to fraction form
    8,141.20/12,209.88 = 3,521.68/x
  3. Step 3: Cross multiply
    8,141.20x = 12,209.88 × 3,521.68
  4. Step 4: Simplify right side
    8,141.20x = 42,999,290.20
  5. Step 5: Solve for x
    x = 42,999,290.20/8,141.20
  6. Step 6: Final answer
    x = 5,281.69

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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.