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Finding the Fourth Proportional to 10,111.96, 15,167.94 and 3,187

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Solution

The fourth proportional to 10,111.96, 15,167.94 and 3,187 is: 4,780.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,111.96 : 15,167.94 = 3,187 : x
  2. Step 2: Convert to fraction form
    10,111.96/15,167.94 = 3,187/x
  3. Step 3: Cross multiply
    10,111.96x = 15,167.94 × 3,187
  4. Step 4: Simplify right side
    10,111.96x = 48,340,224.78
  5. Step 5: Solve for x
    x = 48,340,224.78/10,111.96
  6. Step 6: Final answer
    x = 4,780.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.