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Finding the Fourth Proportional to 7,287.78, 10,058.49 and 4,143.78

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Solution

The fourth proportional to 7,287.78, 10,058.49 and 4,143.78 is: 5,719.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,287.78 : 10,058.49 = 4,143.78 : x
  2. Step 2: Convert to fraction form
    7,287.78/10,058.49 = 4,143.78/x
  3. Step 3: Cross multiply
    7,287.78x = 10,058.49 × 4,143.78
  4. Step 4: Simplify right side
    7,287.78x = 41,680,169.69
  5. Step 5: Solve for x
    x = 41,680,169.69/7,287.78
  6. Step 6: Final answer
    x = 5,719.19

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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.