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Finding the Fourth Proportional to 21,700.22, 29,947.11 and 12,268.22

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Solution

The fourth proportional to 21,700.22, 29,947.11 and 12,268.22 is: 16,930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,700.22 : 29,947.11 = 12,268.22 : x
  2. Step 2: Convert to fraction form
    21,700.22/29,947.11 = 12,268.22/x
  3. Step 3: Cross multiply
    21,700.22x = 29,947.11 × 12,268.22
  4. Step 4: Simplify right side
    21,700.22x = 367,397,733.84
  5. Step 5: Solve for x
    x = 367,397,733.84/21,700.22
  6. Step 6: Final answer
    x = 16,930.60

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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.