Home / 7,785.45-11,678.31-2,238.57

Finding the Fourth Proportional to 7,785.45, 11,678.31 and 2,238.57

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Solution

The fourth proportional to 7,785.45, 11,678.31 and 2,238.57 is: 3,357.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,785.45 : 11,678.31 = 2,238.57 : x
  2. Step 2: Convert to fraction form
    7,785.45/11,678.31 = 2,238.57/x
  3. Step 3: Cross multiply
    7,785.45x = 11,678.31 × 2,238.57
  4. Step 4: Simplify right side
    7,785.45x = 26,142,714.42
  5. Step 5: Solve for x
    x = 26,142,714.42/7,785.45
  6. Step 6: Final answer
    x = 3,357.89

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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.