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Finding the Fourth Proportional to 9,888, 13,645.04 and 5,911.31

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Solution

The fourth proportional to 9,888, 13,645.04 and 5,911.31 is: 8,157.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,888 : 13,645.04 = 5,911.31 : x
  2. Step 2: Convert to fraction form
    9,888/13,645.04 = 5,911.31/x
  3. Step 3: Cross multiply
    9,888x = 13,645.04 × 5,911.31
  4. Step 4: Simplify right side
    9,888x = 80,660,061.40
  5. Step 5: Solve for x
    x = 80,660,061.40/9,888
  6. Step 6: Final answer
    x = 8,157.37

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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.