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Finding the Fourth Proportional to 18,353, 25,331.86 and 11,187.78

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Solution

The fourth proportional to 18,353, 25,331.86 and 11,187.78 is: 15,442.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,353 : 25,331.86 = 11,187.78 : x
  2. Step 2: Convert to fraction form
    18,353/25,331.86 = 11,187.78/x
  3. Step 3: Cross multiply
    18,353x = 25,331.86 × 11,187.78
  4. Step 4: Simplify right side
    18,353x = 283,407,276.67
  5. Step 5: Solve for x
    x = 283,407,276.67/18,353
  6. Step 6: Final answer
    x = 15,442.01

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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.