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Finding the Fourth Proportional to 14,211, 21,324.18 and 6,915

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Solution

The fourth proportional to 14,211, 21,324.18 and 6,915 is: 10,376.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,211 : 21,324.18 = 6,915 : x
  2. Step 2: Convert to fraction form
    14,211/21,324.18 = 6,915/x
  3. Step 3: Cross multiply
    14,211x = 21,324.18 × 6,915
  4. Step 4: Simplify right side
    14,211x = 147,456,704.70
  5. Step 5: Solve for x
    x = 147,456,704.70/14,211
  6. Step 6: Final answer
    x = 10,376.24

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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.