Home / 18,979.39-28,471.52-7,291.09

Finding the Fourth Proportional to 18,979.39, 28,471.52 and 7,291.09

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Solution

The fourth proportional to 18,979.39, 28,471.52 and 7,291.09 is: 10,937.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.39 : 28,471.52 = 7,291.09 : x
  2. Step 2: Convert to fraction form
    18,979.39/28,471.52 = 7,291.09/x
  3. Step 3: Cross multiply
    18,979.39x = 28,471.52 × 7,291.09
  4. Step 4: Simplify right side
    18,979.39x = 207,588,414.76
  5. Step 5: Solve for x
    x = 207,588,414.76/18,979.39
  6. Step 6: Final answer
    x = 10,937.57

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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.