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Finding the Fourth Proportional to 21,600.84, 29,806.86 and 12,167.58

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Solution

The fourth proportional to 21,600.84, 29,806.86 and 12,167.58 is: 16,789.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,600.84 : 29,806.86 = 12,167.58 : x
  2. Step 2: Convert to fraction form
    21,600.84/29,806.86 = 12,167.58/x
  3. Step 3: Cross multiply
    21,600.84x = 29,806.86 × 12,167.58
  4. Step 4: Simplify right side
    21,600.84x = 362,677,353.60
  5. Step 5: Solve for x
    x = 362,677,353.60/21,600.84
  6. Step 6: Final answer
    x = 16,789.97

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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.