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Finding the Fourth Proportional to 13,257, 18,293.79 and 7,288.11

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Solution

The fourth proportional to 13,257, 18,293.79 and 7,288.11 is: 10,057.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,257 : 18,293.79 = 7,288.11 : x
  2. Step 2: Convert to fraction form
    13,257/18,293.79 = 7,288.11/x
  3. Step 3: Cross multiply
    13,257x = 18,293.79 × 7,288.11
  4. Step 4: Simplify right side
    13,257x = 133,327,153.84
  5. Step 5: Solve for x
    x = 133,327,153.84/13,257
  6. Step 6: Final answer
    x = 10,057.11

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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.