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Finding the Fourth Proportional to 32,639.20, 45,039 and 18,492

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Solution

The fourth proportional to 32,639.20, 45,039 and 18,492 is: 25,517.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    32,639.20 : 45,039 = 18,492 : x
  2. Step 2: Convert to fraction form
    32,639.20/45,039 = 18,492/x
  3. Step 3: Cross multiply
    32,639.20x = 45,039 × 18,492
  4. Step 4: Simplify right side
    32,639.20x = 832,861,188
  5. Step 5: Solve for x
    x = 832,861,188/32,639.20
  6. Step 6: Final answer
    x = 25,517.21

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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.