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Finding the Fourth Proportional to 18,394.96, 25,377.16 and 11,318.80

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Solution

The fourth proportional to 18,394.96, 25,377.16 and 11,318.80 is: 15,615.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,394.96 : 25,377.16 = 11,318.80 : x
  2. Step 2: Convert to fraction form
    18,394.96/25,377.16 = 11,318.80/x
  3. Step 3: Cross multiply
    18,394.96x = 25,377.16 × 11,318.80
  4. Step 4: Simplify right side
    18,394.96x = 287,238,998.61
  5. Step 5: Solve for x
    x = 287,238,998.61/18,394.96
  6. Step 6: Final answer
    x = 15,615.09

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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.