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Finding the Fourth Proportional to 5,279.11, 7,284.87 and 2,921.11

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Solution

The fourth proportional to 5,279.11, 7,284.87 and 2,921.11 is: 4,030.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.11 : 7,284.87 = 2,921.11 : x
  2. Step 2: Convert to fraction form
    5,279.11/7,284.87 = 2,921.11/x
  3. Step 3: Cross multiply
    5,279.11x = 7,284.87 × 2,921.11
  4. Step 4: Simplify right side
    5,279.11x = 21,279,906.61
  5. Step 5: Solve for x
    x = 21,279,906.61/5,279.11
  6. Step 6: Final answer
    x = 4,030.96

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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.