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Finding the Fourth Proportional to 8,638.95, 12,957.98 and 2,795.11

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Solution

The fourth proportional to 8,638.95, 12,957.98 and 2,795.11 is: 4,192.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.95 : 12,957.98 = 2,795.11 : x
  2. Step 2: Convert to fraction form
    8,638.95/12,957.98 = 2,795.11/x
  3. Step 3: Cross multiply
    8,638.95x = 12,957.98 × 2,795.11
  4. Step 4: Simplify right side
    8,638.95x = 36,218,933.11
  5. Step 5: Solve for x
    x = 36,218,933.11/8,638.95
  6. Step 6: Final answer
    x = 4,192.51

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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.