Home / 5,278.92-7,284.96-2,921.28

Finding the Fourth Proportional to 5,278.92, 7,284.96 and 2,921.28

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Solution

The fourth proportional to 5,278.92, 7,284.96 and 2,921.28 is: 4,031.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.92 : 7,284.96 = 2,921.28 : x
  2. Step 2: Convert to fraction form
    5,278.92/7,284.96 = 2,921.28/x
  3. Step 3: Cross multiply
    5,278.92x = 7,284.96 × 2,921.28
  4. Step 4: Simplify right side
    5,278.92x = 21,281,407.95
  5. Step 5: Solve for x
    x = 21,281,407.95/5,278.92
  6. Step 6: Final answer
    x = 4,031.39

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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.