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Finding the Fourth Proportional to 7,042.75, 9,720.08 and 4,249.87

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Solution

The fourth proportional to 7,042.75, 9,720.08 and 4,249.87 is: 5,865.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,042.75 : 9,720.08 = 4,249.87 : x
  2. Step 2: Convert to fraction form
    7,042.75/9,720.08 = 4,249.87/x
  3. Step 3: Cross multiply
    7,042.75x = 9,720.08 × 4,249.87
  4. Step 4: Simplify right side
    7,042.75x = 41,309,076.39
  5. Step 5: Solve for x
    x = 41,309,076.39/7,042.75
  6. Step 6: Final answer
    x = 5,865.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.