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Finding the Fourth Proportional to 21,912.87, 32,874.83 and 6,117.89

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Solution

The fourth proportional to 21,912.87, 32,874.83 and 6,117.89 is: 9,178.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.87 : 32,874.83 = 6,117.89 : x
  2. Step 2: Convert to fraction form
    21,912.87/32,874.83 = 6,117.89/x
  3. Step 3: Cross multiply
    21,912.87x = 32,874.83 × 6,117.89
  4. Step 4: Simplify right side
    21,912.87x = 201,124,421.69
  5. Step 5: Solve for x
    x = 201,124,421.69/21,912.87
  6. Step 6: Final answer
    x = 9,178.37

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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.