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Finding the Fourth Proportional to 10,881.75, 15,016.91 and 5,913.75

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Solution

The fourth proportional to 10,881.75, 15,016.91 and 5,913.75 is: 8,161.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,881.75 : 15,016.91 = 5,913.75 : x
  2. Step 2: Convert to fraction form
    10,881.75/15,016.91 = 5,913.75/x
  3. Step 3: Cross multiply
    10,881.75x = 15,016.91 × 5,913.75
  4. Step 4: Simplify right side
    10,881.75x = 88,806,251.51
  5. Step 5: Solve for x
    x = 88,806,251.51/10,881.75
  6. Step 6: Final answer
    x = 8,161.03

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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.