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Finding the Fourth Proportional to 7,957.56, 10,986.36 and 5,129.79

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Solution

The fourth proportional to 7,957.56, 10,986.36 and 5,129.79 is: 7,082.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,957.56 : 10,986.36 = 5,129.79 : x
  2. Step 2: Convert to fraction form
    7,957.56/10,986.36 = 5,129.79/x
  3. Step 3: Cross multiply
    7,957.56x = 10,986.36 × 5,129.79
  4. Step 4: Simplify right side
    7,957.56x = 56,357,719.66
  5. Step 5: Solve for x
    x = 56,357,719.66/7,957.56
  6. Step 6: Final answer
    x = 7,082.29

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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.