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Finding the Fourth Proportional to 18,629.70, 25,691.41 and 12,245.01

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Solution

The fourth proportional to 18,629.70, 25,691.41 and 12,245.01 is: 16,886.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,629.70 : 25,691.41 = 12,245.01 : x
  2. Step 2: Convert to fraction form
    18,629.70/25,691.41 = 12,245.01/x
  3. Step 3: Cross multiply
    18,629.70x = 25,691.41 × 12,245.01
  4. Step 4: Simplify right side
    18,629.70x = 314,591,572.36
  5. Step 5: Solve for x
    x = 314,591,572.36/18,629.70
  6. Step 6: Final answer
    x = 16,886.56

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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.