Home / 3,688.78-5,091.24-2,117.92

Finding the Fourth Proportional to 3,688.78, 5,091.24 and 2,117.92

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Solution

The fourth proportional to 3,688.78, 5,091.24 and 2,117.92 is: 2,923.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,688.78 : 5,091.24 = 2,117.92 : x
  2. Step 2: Convert to fraction form
    3,688.78/5,091.24 = 2,117.92/x
  3. Step 3: Cross multiply
    3,688.78x = 5,091.24 × 2,117.92
  4. Step 4: Simplify right side
    3,688.78x = 10,782,839.02
  5. Step 5: Solve for x
    x = 10,782,839.02/3,688.78
  6. Step 6: Final answer
    x = 2,923.15

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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.