Home / 7,979.20-11,961.60-5,207.20

Finding the Fourth Proportional to 7,979.20, 11,961.60 and 5,207.20

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Solution

The fourth proportional to 7,979.20, 11,961.60 and 5,207.20 is: 7,806.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,979.20 : 11,961.60 = 5,207.20 : x
  2. Step 2: Convert to fraction form
    7,979.20/11,961.60 = 5,207.20/x
  3. Step 3: Cross multiply
    7,979.20x = 11,961.60 × 5,207.20
  4. Step 4: Simplify right side
    7,979.20x = 62,286,443.52
  5. Step 5: Solve for x
    x = 62,286,443.52/7,979.20
  6. Step 6: Final answer
    x = 7,806.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.