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Finding the Fourth Proportional to 3,715.92, 5,127.78 and 2,143.92

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Solution

The fourth proportional to 3,715.92, 5,127.78 and 2,143.92 is: 2,958.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,715.92 : 5,127.78 = 2,143.92 : x
  2. Step 2: Convert to fraction form
    3,715.92/5,127.78 = 2,143.92/x
  3. Step 3: Cross multiply
    3,715.92x = 5,127.78 × 2,143.92
  4. Step 4: Simplify right side
    3,715.92x = 10,993,550.10
  5. Step 5: Solve for x
    x = 10,993,550.10/3,715.92
  6. Step 6: Final answer
    x = 2,958.50

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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.