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Finding the Fourth Proportional to 18,255.60, 25,191 and 11,180.88

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Solution

The fourth proportional to 18,255.60, 25,191 and 11,180.88 is: 15,428.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,255.60 : 25,191 = 11,180.88 : x
  2. Step 2: Convert to fraction form
    18,255.60/25,191 = 11,180.88/x
  3. Step 3: Cross multiply
    18,255.60x = 25,191 × 11,180.88
  4. Step 4: Simplify right side
    18,255.60x = 281,657,548.08
  5. Step 5: Solve for x
    x = 281,657,548.08/18,255.60
  6. Step 6: Final answer
    x = 15,428.56

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1.5x scale

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.