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Finding the Fourth Proportional to 12,063.88, 18,129.78 and 7,135.84

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Solution

The fourth proportional to 12,063.88, 18,129.78 and 7,135.84 is: 10,723.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,063.88 : 18,129.78 = 7,135.84 : x
  2. Step 2: Convert to fraction form
    12,063.88/18,129.78 = 7,135.84/x
  3. Step 3: Cross multiply
    12,063.88x = 18,129.78 × 7,135.84
  4. Step 4: Simplify right side
    12,063.88x = 129,371,209.32
  5. Step 5: Solve for x
    x = 129,371,209.32/12,063.88
  6. Step 6: Final answer
    x = 10,723.85

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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.