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Finding the Fourth Proportional to 7,979.76, 11,004.90 and 4,995.87

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Solution

The fourth proportional to 7,979.76, 11,004.90 and 4,995.87 is: 6,889.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,979.76 : 11,004.90 = 4,995.87 : x
  2. Step 2: Convert to fraction form
    7,979.76/11,004.90 = 4,995.87/x
  3. Step 3: Cross multiply
    7,979.76x = 11,004.90 × 4,995.87
  4. Step 4: Simplify right side
    7,979.76x = 54,979,049.76
  5. Step 5: Solve for x
    x = 54,979,049.76/7,979.76
  6. Step 6: Final answer
    x = 6,889.81

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1.5x scale

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.