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Finding the Fourth Proportional to 17,987.85, 26,988.80 and 11,419.29

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Solution

The fourth proportional to 17,987.85, 26,988.80 and 11,419.29 is: 17,133.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,987.85 : 26,988.80 = 11,419.29 : x
  2. Step 2: Convert to fraction form
    17,987.85/26,988.80 = 11,419.29/x
  3. Step 3: Cross multiply
    17,987.85x = 26,988.80 × 11,419.29
  4. Step 4: Simplify right side
    17,987.85x = 308,192,876.86
  5. Step 5: Solve for x
    x = 308,192,876.86/17,987.85
  6. Step 6: Final answer
    x = 17,133.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.