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Finding the Fourth Proportional to 12,156.70, 18,239.10 and 10,850.20

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Solution

The fourth proportional to 12,156.70, 18,239.10 and 10,850.20 is: 16,278.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.70 : 18,239.10 = 10,850.20 : x
  2. Step 2: Convert to fraction form
    12,156.70/18,239.10 = 10,850.20/x
  3. Step 3: Cross multiply
    12,156.70x = 18,239.10 × 10,850.20
  4. Step 4: Simplify right side
    12,156.70x = 197,897,882.82
  5. Step 5: Solve for x
    x = 197,897,882.82/12,156.70
  6. Step 6: Final answer
    x = 16,278.91

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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.