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Finding the Fourth Proportional to 3,561.31, 4,916.93 and 3,187.65

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Solution

The fourth proportional to 3,561.31, 4,916.93 and 3,187.65 is: 4,401.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.31 : 4,916.93 = 3,187.65 : x
  2. Step 2: Convert to fraction form
    3,561.31/4,916.93 = 3,187.65/x
  3. Step 3: Cross multiply
    3,561.31x = 4,916.93 × 3,187.65
  4. Step 4: Simplify right side
    3,561.31x = 15,673,435.98
  5. Step 5: Solve for x
    x = 15,673,435.98/3,561.31
  6. Step 6: Final answer
    x = 4,401.03

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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.