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Finding the Fourth Proportional to 21,761.85, 30,031.08 and 12,201.69

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Solution

The fourth proportional to 21,761.85, 30,031.08 and 12,201.69 is: 16,838.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.85 : 30,031.08 = 12,201.69 : x
  2. Step 2: Convert to fraction form
    21,761.85/30,031.08 = 12,201.69/x
  3. Step 3: Cross multiply
    21,761.85x = 30,031.08 × 12,201.69
  4. Step 4: Simplify right side
    21,761.85x = 366,429,928.53
  5. Step 5: Solve for x
    x = 366,429,928.53/21,761.85
  6. Step 6: Final answer
    x = 16,838.18

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.