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Finding the Fourth Proportional to 18,462.78, 25,473.09 and 10,909.80

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Solution

The fourth proportional to 18,462.78, 25,473.09 and 10,909.80 is: 15,052.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,462.78 : 25,473.09 = 10,909.80 : x
  2. Step 2: Convert to fraction form
    18,462.78/25,473.09 = 10,909.80/x
  3. Step 3: Cross multiply
    18,462.78x = 25,473.09 × 10,909.80
  4. Step 4: Simplify right side
    18,462.78x = 277,906,317.28
  5. Step 5: Solve for x
    x = 277,906,317.28/18,462.78
  6. Step 6: Final answer
    x = 15,052.25

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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.