Home / 3,161.78-4,356.69-2,688.02

Finding the Fourth Proportional to 3,161.78, 4,356.69 and 2,688.02

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Solution

The fourth proportional to 3,161.78, 4,356.69 and 2,688.02 is: 3,703.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.78 : 4,356.69 = 2,688.02 : x
  2. Step 2: Convert to fraction form
    3,161.78/4,356.69 = 2,688.02/x
  3. Step 3: Cross multiply
    3,161.78x = 4,356.69 × 2,688.02
  4. Step 4: Simplify right side
    3,161.78x = 11,710,869.85
  5. Step 5: Solve for x
    x = 11,710,869.85/3,161.78
  6. Step 6: Final answer
    x = 3,703.89

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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.