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Finding the Fourth Proportional to 18,661.58, 25,741.41 and 11,102.80

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Solution

The fourth proportional to 18,661.58, 25,741.41 and 11,102.80 is: 15,314.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.58 : 25,741.41 = 11,102.80 : x
  2. Step 2: Convert to fraction form
    18,661.58/25,741.41 = 11,102.80/x
  3. Step 3: Cross multiply
    18,661.58x = 25,741.41 × 11,102.80
  4. Step 4: Simplify right side
    18,661.58x = 285,801,726.95
  5. Step 5: Solve for x
    x = 285,801,726.95/18,661.58
  6. Step 6: Final answer
    x = 15,314.98

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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.