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Finding the Fourth Proportional to 6,616.66, 9,129.59 and 3,927.79

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Solution

The fourth proportional to 6,616.66, 9,129.59 and 3,927.79 is: 5,419.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,616.66 : 9,129.59 = 3,927.79 : x
  2. Step 2: Convert to fraction form
    6,616.66/9,129.59 = 3,927.79/x
  3. Step 3: Cross multiply
    6,616.66x = 9,129.59 × 3,927.79
  4. Step 4: Simplify right side
    6,616.66x = 35,859,107.76
  5. Step 5: Solve for x
    x = 35,859,107.76/6,616.66
  6. Step 6: Final answer
    x = 5,419.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.