Home / 9,115.20-12,579.30-5,082.40

Finding the Fourth Proportional to 9,115.20, 12,579.30 and 5,082.40

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Solution

The fourth proportional to 9,115.20, 12,579.30 and 5,082.40 is: 7,013.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,115.20 : 12,579.30 = 5,082.40 : x
  2. Step 2: Convert to fraction form
    9,115.20/12,579.30 = 5,082.40/x
  3. Step 3: Cross multiply
    9,115.20x = 12,579.30 × 5,082.40
  4. Step 4: Simplify right side
    9,115.20x = 63,933,034.32
  5. Step 5: Solve for x
    x = 63,933,034.32/9,115.20
  6. Step 6: Final answer
    x = 7,013.89

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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.