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Finding the Fourth Proportional to 9,157.72, 13,736.44 and 2,918.11

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Solution

The fourth proportional to 9,157.72, 13,736.44 and 2,918.11 is: 4,377.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,157.72 : 13,736.44 = 2,918.11 : x
  2. Step 2: Convert to fraction form
    9,157.72/13,736.44 = 2,918.11/x
  3. Step 3: Cross multiply
    9,157.72x = 13,736.44 × 2,918.11
  4. Step 4: Simplify right side
    9,157.72x = 40,084,442.93
  5. Step 5: Solve for x
    x = 40,084,442.93/9,157.72
  6. Step 6: Final answer
    x = 4,377.12

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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.