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Finding the Fourth Proportional to 13,356.60, 18,432 and 7,388.24

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Solution

The fourth proportional to 13,356.60, 18,432 and 7,388.24 is: 10,195.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.60 : 18,432 = 7,388.24 : x
  2. Step 2: Convert to fraction form
    13,356.60/18,432 = 7,388.24/x
  3. Step 3: Cross multiply
    13,356.60x = 18,432 × 7,388.24
  4. Step 4: Simplify right side
    13,356.60x = 136,180,039.68
  5. Step 5: Solve for x
    x = 136,180,039.68/13,356.60
  6. Step 6: Final answer
    x = 10,195.71

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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.