Home / 12,492.30-18,738.45-5,091.90

Finding the Fourth Proportional to 12,492.30, 18,738.45 and 5,091.90

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Solution

The fourth proportional to 12,492.30, 18,738.45 and 5,091.90 is: 7,637.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,492.30 : 18,738.45 = 5,091.90 : x
  2. Step 2: Convert to fraction form
    12,492.30/18,738.45 = 5,091.90/x
  3. Step 3: Cross multiply
    12,492.30x = 18,738.45 × 5,091.90
  4. Step 4: Simplify right side
    12,492.30x = 95,414,313.56
  5. Step 5: Solve for x
    x = 95,414,313.56/12,492.30
  6. Step 6: Final answer
    x = 7,637.85

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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.