Home / 8,112.96-12,150-7,238.16

Finding the Fourth Proportional to 8,112.96, 12,150 and 7,238.16

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Solution

The fourth proportional to 8,112.96, 12,150 and 7,238.16 is: 10,839.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,112.96 : 12,150 = 7,238.16 : x
  2. Step 2: Convert to fraction form
    8,112.96/12,150 = 7,238.16/x
  3. Step 3: Cross multiply
    8,112.96x = 12,150 × 7,238.16
  4. Step 4: Simplify right side
    8,112.96x = 87,943,644
  5. Step 5: Solve for x
    x = 87,943,644/8,112.96
  6. Step 6: Final answer
    x = 10,839.90

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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.