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Finding the Fourth Proportional to 18,671.54, 25,769.90 and 11,122.13

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Solution

The fourth proportional to 18,671.54, 25,769.90 and 11,122.13 is: 15,350.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.54 : 25,769.90 = 11,122.13 : x
  2. Step 2: Convert to fraction form
    18,671.54/25,769.90 = 11,122.13/x
  3. Step 3: Cross multiply
    18,671.54x = 25,769.90 × 11,122.13
  4. Step 4: Simplify right side
    18,671.54x = 286,615,993.43
  5. Step 5: Solve for x
    x = 286,615,993.43/18,671.54
  6. Step 6: Final answer
    x = 15,350.42

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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.