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Finding the Fourth Proportional to 17,398.70, 26,099.75 and 4,918.82

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Solution

The fourth proportional to 17,398.70, 26,099.75 and 4,918.82 is: 7,378.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,398.70 : 26,099.75 = 4,918.82 : x
  2. Step 2: Convert to fraction form
    17,398.70/26,099.75 = 4,918.82/x
  3. Step 3: Cross multiply
    17,398.70x = 26,099.75 × 4,918.82
  4. Step 4: Simplify right side
    17,398.70x = 128,379,817.20
  5. Step 5: Solve for x
    x = 128,379,817.20/17,398.70
  6. Step 6: Final answer
    x = 7,378.70

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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.