Home / 9,388.83-12,956.38-5,139.78

Finding the Fourth Proportional to 9,388.83, 12,956.38 and 5,139.78

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Solution

The fourth proportional to 9,388.83, 12,956.38 and 5,139.78 is: 7,092.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,388.83 : 12,956.38 = 5,139.78 : x
  2. Step 2: Convert to fraction form
    9,388.83/12,956.38 = 5,139.78/x
  3. Step 3: Cross multiply
    9,388.83x = 12,956.38 × 5,139.78
  4. Step 4: Simplify right side
    9,388.83x = 66,592,942.80
  5. Step 5: Solve for x
    x = 66,592,942.80/9,388.83
  6. Step 6: Final answer
    x = 7,092.78

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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.