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Finding the Fourth Proportional to 17,689.36, 26,512.16 and 8,919.48

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Solution

The fourth proportional to 17,689.36, 26,512.16 and 8,919.48 is: 13,368.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,689.36 : 26,512.16 = 8,919.48 : x
  2. Step 2: Convert to fraction form
    17,689.36/26,512.16 = 8,919.48/x
  3. Step 3: Cross multiply
    17,689.36x = 26,512.16 × 8,919.48
  4. Step 4: Simplify right side
    17,689.36x = 236,474,680.88
  5. Step 5: Solve for x
    x = 236,474,680.88/17,689.36
  6. Step 6: Final answer
    x = 13,368.19

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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.