Home / 7,881.20-11,821.91-2,335.10

Finding the Fourth Proportional to 7,881.20, 11,821.91 and 2,335.10

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Solution

The fourth proportional to 7,881.20, 11,821.91 and 2,335.10 is: 3,502.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.20 : 11,821.91 = 2,335.10 : x
  2. Step 2: Convert to fraction form
    7,881.20/11,821.91 = 2,335.10/x
  3. Step 3: Cross multiply
    7,881.20x = 11,821.91 × 2,335.10
  4. Step 4: Simplify right side
    7,881.20x = 27,605,359.92
  5. Step 5: Solve for x
    x = 27,605,359.92/7,881.20
  6. Step 6: Final answer
    x = 3,502.69

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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.