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Finding the Fourth Proportional to 18,929.26, 28,398.03 and 5,781.30

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Solution

The fourth proportional to 18,929.26, 28,398.03 and 5,781.30 is: 8,673.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,929.26 : 28,398.03 = 5,781.30 : x
  2. Step 2: Convert to fraction form
    18,929.26/28,398.03 = 5,781.30/x
  3. Step 3: Cross multiply
    18,929.26x = 28,398.03 × 5,781.30
  4. Step 4: Simplify right side
    18,929.26x = 164,177,530.84
  5. Step 5: Solve for x
    x = 164,177,530.84/18,929.26
  6. Step 6: Final answer
    x = 8,673.21

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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.