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Finding the Fourth Proportional to 7,717.80, 11,579.40 and 3,338.40

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Solution

The fourth proportional to 7,717.80, 11,579.40 and 3,338.40 is: 5,008.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,717.80 : 11,579.40 = 3,338.40 : x
  2. Step 2: Convert to fraction form
    7,717.80/11,579.40 = 3,338.40/x
  3. Step 3: Cross multiply
    7,717.80x = 11,579.40 × 3,338.40
  4. Step 4: Simplify right side
    7,717.80x = 38,656,668.96
  5. Step 5: Solve for x
    x = 38,656,668.96/7,717.80
  6. Step 6: Final answer
    x = 5,008.77

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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.