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Finding the Fourth Proportional to 13,449, 18,559.62 and 7,561

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Solution

The fourth proportional to 13,449, 18,559.62 and 7,561 is: 10,434.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,449 : 18,559.62 = 7,561 : x
  2. Step 2: Convert to fraction form
    13,449/18,559.62 = 7,561/x
  3. Step 3: Cross multiply
    13,449x = 18,559.62 × 7,561
  4. Step 4: Simplify right side
    13,449x = 140,329,286.82
  5. Step 5: Solve for x
    x = 140,329,286.82/13,449
  6. Step 6: Final answer
    x = 10,434.18

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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.