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Finding the Fourth Proportional to 18,993.69, 26,174.75 and 13,394.97

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Solution

The fourth proportional to 18,993.69, 26,174.75 and 13,394.97 is: 18,459.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,993.69 : 26,174.75 = 13,394.97 : x
  2. Step 2: Convert to fraction form
    18,993.69/26,174.75 = 13,394.97/x
  3. Step 3: Cross multiply
    18,993.69x = 26,174.75 × 13,394.97
  4. Step 4: Simplify right side
    18,993.69x = 350,609,924.03
  5. Step 5: Solve for x
    x = 350,609,924.03/18,993.69
  6. Step 6: Final answer
    x = 18,459.28

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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.