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Finding the Fourth Proportional to 21,810, 30,098.44 and 11,874.64

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Solution

The fourth proportional to 21,810, 30,098.44 and 11,874.64 is: 16,387.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,810 : 30,098.44 = 11,874.64 : x
  2. Step 2: Convert to fraction form
    21,810/30,098.44 = 11,874.64/x
  3. Step 3: Cross multiply
    21,810x = 30,098.44 × 11,874.64
  4. Step 4: Simplify right side
    21,810x = 357,408,139.56
  5. Step 5: Solve for x
    x = 357,408,139.56/21,810
  6. Step 6: Final answer
    x = 16,387.35

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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.