Home / 5,279.20-7,284.90-2,921.38

Finding the Fourth Proportional to 5,279.20, 7,284.90 and 2,921.38

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Solution

The fourth proportional to 5,279.20, 7,284.90 and 2,921.38 is: 4,031.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.20 : 7,284.90 = 2,921.38 : x
  2. Step 2: Convert to fraction form
    5,279.20/7,284.90 = 2,921.38/x
  3. Step 3: Cross multiply
    5,279.20x = 7,284.90 × 2,921.38
  4. Step 4: Simplify right side
    5,279.20x = 21,281,961.16
  5. Step 5: Solve for x
    x = 21,281,961.16/5,279.20
  6. Step 6: Final answer
    x = 4,031.29

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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.