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Finding the Fourth Proportional to 19,091.56, 28,640.07 and 7,249.78

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Solution

The fourth proportional to 19,091.56, 28,640.07 and 7,249.78 is: 10,875.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,091.56 : 28,640.07 = 7,249.78 : x
  2. Step 2: Convert to fraction form
    19,091.56/28,640.07 = 7,249.78/x
  3. Step 3: Cross multiply
    19,091.56x = 28,640.07 × 7,249.78
  4. Step 4: Simplify right side
    19,091.56x = 207,634,206.68
  5. Step 5: Solve for x
    x = 207,634,206.68/19,091.56
  6. Step 6: Final answer
    x = 10,875.71

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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.