Home / 7,876.12-11,821.48-3,983.28

Finding the Fourth Proportional to 7,876.12, 11,821.48 and 3,983.28

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Solution

The fourth proportional to 7,876.12, 11,821.48 and 3,983.28 is: 5,978.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.12 : 11,821.48 = 3,983.28 : x
  2. Step 2: Convert to fraction form
    7,876.12/11,821.48 = 3,983.28/x
  3. Step 3: Cross multiply
    7,876.12x = 11,821.48 × 3,983.28
  4. Step 4: Simplify right side
    7,876.12x = 47,088,264.85
  5. Step 5: Solve for x
    x = 47,088,264.85/7,876.12
  6. Step 6: Final answer
    x = 5,978.61

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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.