Home / 12,286.62-18,430.20-3,521.88

Finding the Fourth Proportional to 12,286.62, 18,430.20 and 3,521.88

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Solution

The fourth proportional to 12,286.62, 18,430.20 and 3,521.88 is: 5,282.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,286.62 : 18,430.20 = 3,521.88 : x
  2. Step 2: Convert to fraction form
    12,286.62/18,430.20 = 3,521.88/x
  3. Step 3: Cross multiply
    12,286.62x = 18,430.20 × 3,521.88
  4. Step 4: Simplify right side
    12,286.62x = 64,908,952.78
  5. Step 5: Solve for x
    x = 64,908,952.78/12,286.62
  6. Step 6: Final answer
    x = 5,282.90

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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.