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Finding the Fourth Proportional to 21,218, 31,827 and 6,626

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Solution

The fourth proportional to 21,218, 31,827 and 6,626 is: 9,939

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218 : 31,827 = 6,626 : x
  2. Step 2: Convert to fraction form
    21,218/31,827 = 6,626/x
  3. Step 3: Cross multiply
    21,218x = 31,827 × 6,626
  4. Step 4: Simplify right side
    21,218x = 210,885,702
  5. Step 5: Solve for x
    x = 210,885,702/21,218
  6. Step 6: Final answer
    x = 9,939

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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.