Home / 7,991.12-11,989.08-3,061.20

Finding the Fourth Proportional to 7,991.12, 11,989.08 and 3,061.20

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Solution

The fourth proportional to 7,991.12, 11,989.08 and 3,061.20 is: 4,592.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.12 : 11,989.08 = 3,061.20 : x
  2. Step 2: Convert to fraction form
    7,991.12/11,989.08 = 3,061.20/x
  3. Step 3: Cross multiply
    7,991.12x = 11,989.08 × 3,061.20
  4. Step 4: Simplify right side
    7,991.12x = 36,700,971.70
  5. Step 5: Solve for x
    x = 36,700,971.70/7,991.12
  6. Step 6: Final answer
    x = 4,592.72

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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.