Home / 7,972.64-11,961.36-4,079.76

Finding the Fourth Proportional to 7,972.64, 11,961.36 and 4,079.76

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Solution

The fourth proportional to 7,972.64, 11,961.36 and 4,079.76 is: 6,120.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,972.64 : 11,961.36 = 4,079.76 : x
  2. Step 2: Convert to fraction form
    7,972.64/11,961.36 = 4,079.76/x
  3. Step 3: Cross multiply
    7,972.64x = 11,961.36 × 4,079.76
  4. Step 4: Simplify right side
    7,972.64x = 48,799,478.07
  5. Step 5: Solve for x
    x = 48,799,478.07/7,972.64
  6. Step 6: Final answer
    x = 6,120.87

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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.