Home / 7,961.40-10,979.28-5,403.96

Finding the Fourth Proportional to 7,961.40, 10,979.28 and 5,403.96

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Solution

The fourth proportional to 7,961.40, 10,979.28 and 5,403.96 is: 7,452.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.40 : 10,979.28 = 5,403.96 : x
  2. Step 2: Convert to fraction form
    7,961.40/10,979.28 = 5,403.96/x
  3. Step 3: Cross multiply
    7,961.40x = 10,979.28 × 5,403.96
  4. Step 4: Simplify right side
    7,961.40x = 59,331,589.95
  5. Step 5: Solve for x
    x = 59,331,589.95/7,961.40
  6. Step 6: Final answer
    x = 7,452.41

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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.