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Finding the Fourth Proportional to 21,651.67, 29,877.15 and 12,218.41

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Solution

The fourth proportional to 21,651.67, 29,877.15 and 12,218.41 is: 16,860.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.67 : 29,877.15 = 12,218.41 : x
  2. Step 2: Convert to fraction form
    21,651.67/29,877.15 = 12,218.41/x
  3. Step 3: Cross multiply
    21,651.67x = 29,877.15 × 12,218.41
  4. Step 4: Simplify right side
    21,651.67x = 365,051,268.33
  5. Step 5: Solve for x
    x = 365,051,268.33/21,651.67
  6. Step 6: Final answer
    x = 16,860.19

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1.5x scale

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.