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Finding the Fourth Proportional to 18,339.60, 27,490.44 and 7,231.32

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Solution

The fourth proportional to 18,339.60, 27,490.44 and 7,231.32 is: 10,839.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339.60 : 27,490.44 = 7,231.32 : x
  2. Step 2: Convert to fraction form
    18,339.60/27,490.44 = 7,231.32/x
  3. Step 3: Cross multiply
    18,339.60x = 27,490.44 × 7,231.32
  4. Step 4: Simplify right side
    18,339.60x = 198,792,168.58
  5. Step 5: Solve for x
    x = 198,792,168.58/18,339.60
  6. Step 6: Final answer
    x = 10,839.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.