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Finding the Fourth Proportional to 13,672.29, 18,868.05 and 7,703.82

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Solution

The fourth proportional to 13,672.29, 18,868.05 and 7,703.82 is: 10,631.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.29 : 18,868.05 = 7,703.82 : x
  2. Step 2: Convert to fraction form
    13,672.29/18,868.05 = 7,703.82/x
  3. Step 3: Cross multiply
    13,672.29x = 18,868.05 × 7,703.82
  4. Step 4: Simplify right side
    13,672.29x = 145,356,060.95
  5. Step 5: Solve for x
    x = 145,356,060.95/13,672.29
  6. Step 6: Final answer
    x = 10,631.43

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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.