Home / 18,421.38-27,630.78-7,891.38

Finding the Fourth Proportional to 18,421.38, 27,630.78 and 7,891.38

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Solution

The fourth proportional to 18,421.38, 27,630.78 and 7,891.38 is: 11,836.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.38 : 27,630.78 = 7,891.38 : x
  2. Step 2: Convert to fraction form
    18,421.38/27,630.78 = 7,891.38/x
  3. Step 3: Cross multiply
    18,421.38x = 27,630.78 × 7,891.38
  4. Step 4: Simplify right side
    18,421.38x = 218,044,984.68
  5. Step 5: Solve for x
    x = 218,044,984.68/18,421.38
  6. Step 6: Final answer
    x = 11,836.52

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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.