Home / 12,143.20-18,214.80-9,682.78

Finding the Fourth Proportional to 12,143.20, 18,214.80 and 9,682.78

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Solution

The fourth proportional to 12,143.20, 18,214.80 and 9,682.78 is: 14,524.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.20 : 18,214.80 = 9,682.78 : x
  2. Step 2: Convert to fraction form
    12,143.20/18,214.80 = 9,682.78/x
  3. Step 3: Cross multiply
    12,143.20x = 18,214.80 × 9,682.78
  4. Step 4: Simplify right side
    12,143.20x = 176,369,901.14
  5. Step 5: Solve for x
    x = 176,369,901.14/12,143.20
  6. Step 6: Final answer
    x = 14,524.17

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Similar ratio
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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.