Home / 7,785.78-11,680.62-2,239.12

Finding the Fourth Proportional to 7,785.78, 11,680.62 and 2,239.12

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Solution

The fourth proportional to 7,785.78, 11,680.62 and 2,239.12 is: 3,359.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,785.78 : 11,680.62 = 2,239.12 : x
  2. Step 2: Convert to fraction form
    7,785.78/11,680.62 = 2,239.12/x
  3. Step 3: Cross multiply
    7,785.78x = 11,680.62 × 2,239.12
  4. Step 4: Simplify right side
    7,785.78x = 26,154,309.85
  5. Step 5: Solve for x
    x = 26,154,309.85/7,785.78
  6. Step 6: Final answer
    x = 3,359.24

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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.