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Finding the Fourth Proportional to 10,860, 14,989.32 and 6,144.72

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Solution

The fourth proportional to 10,860, 14,989.32 and 6,144.72 is: 8,481.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,860 : 14,989.32 = 6,144.72 : x
  2. Step 2: Convert to fraction form
    10,860/14,989.32 = 6,144.72/x
  3. Step 3: Cross multiply
    10,860x = 14,989.32 × 6,144.72
  4. Step 4: Simplify right side
    10,860x = 92,105,174.39
  5. Step 5: Solve for x
    x = 92,105,174.39/10,860
  6. Step 6: Final answer
    x = 8,481.14

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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.