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Finding the Fourth Proportional to 30,356, 41,891.28 and 17,108

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Solution

The fourth proportional to 30,356, 41,891.28 and 17,108 is: 23,609.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,356 : 41,891.28 = 17,108 : x
  2. Step 2: Convert to fraction form
    30,356/41,891.28 = 17,108/x
  3. Step 3: Cross multiply
    30,356x = 41,891.28 × 17,108
  4. Step 4: Simplify right side
    30,356x = 716,676,018.24
  5. Step 5: Solve for x
    x = 716,676,018.24/30,356
  6. Step 6: Final answer
    x = 23,609.04

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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.