Home / 7,978.16-11,966.76-2,979.56

Finding the Fourth Proportional to 7,978.16, 11,966.76 and 2,979.56

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Solution

The fourth proportional to 7,978.16, 11,966.76 and 2,979.56 is: 4,469.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978.16 : 11,966.76 = 2,979.56 : x
  2. Step 2: Convert to fraction form
    7,978.16/11,966.76 = 2,979.56/x
  3. Step 3: Cross multiply
    7,978.16x = 11,966.76 × 2,979.56
  4. Step 4: Simplify right side
    7,978.16x = 35,655,679.43
  5. Step 5: Solve for x
    x = 35,655,679.43/7,978.16
  6. Step 6: Final answer
    x = 4,469.16

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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.