Home / 9,279.28-12,805.40-5,087.60

Finding the Fourth Proportional to 9,279.28, 12,805.40 and 5,087.60

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Solution

The fourth proportional to 9,279.28, 12,805.40 and 5,087.60 is: 7,020.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,279.28 : 12,805.40 = 5,087.60 : x
  2. Step 2: Convert to fraction form
    9,279.28/12,805.40 = 5,087.60/x
  3. Step 3: Cross multiply
    9,279.28x = 12,805.40 × 5,087.60
  4. Step 4: Simplify right side
    9,279.28x = 65,148,753.04
  5. Step 5: Solve for x
    x = 65,148,753.04/9,279.28
  6. Step 6: Final answer
    x = 7,020.88

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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.