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Finding the Fourth Proportional to 18,290.25, 25,241.01 and 11,117.70

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Solution

The fourth proportional to 18,290.25, 25,241.01 and 11,117.70 is: 15,342.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,290.25 : 25,241.01 = 11,117.70 : x
  2. Step 2: Convert to fraction form
    18,290.25/25,241.01 = 11,117.70/x
  3. Step 3: Cross multiply
    18,290.25x = 25,241.01 × 11,117.70
  4. Step 4: Simplify right side
    18,290.25x = 280,621,976.88
  5. Step 5: Solve for x
    x = 280,621,976.88/18,290.25
  6. Step 6: Final answer
    x = 15,342.71

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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.