Home / 18,920.38-28,387.05-7,236.94

Finding the Fourth Proportional to 18,920.38, 28,387.05 and 7,236.94

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Solution

The fourth proportional to 18,920.38, 28,387.05 and 7,236.94 is: 10,857.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.38 : 28,387.05 = 7,236.94 : x
  2. Step 2: Convert to fraction form
    18,920.38/28,387.05 = 7,236.94/x
  3. Step 3: Cross multiply
    18,920.38x = 28,387.05 × 7,236.94
  4. Step 4: Simplify right side
    18,920.38x = 205,435,377.63
  5. Step 5: Solve for x
    x = 205,435,377.63/18,920.38
  6. Step 6: Final answer
    x = 10,857.89

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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.