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Finding the Fourth Proportional to 21,641.97, 29,865.87 and 12,210.48

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Solution

The fourth proportional to 21,641.97, 29,865.87 and 12,210.48 is: 16,850.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,641.97 : 29,865.87 = 12,210.48 : x
  2. Step 2: Convert to fraction form
    21,641.97/29,865.87 = 12,210.48/x
  3. Step 3: Cross multiply
    21,641.97x = 29,865.87 × 12,210.48
  4. Step 4: Simplify right side
    21,641.97x = 364,676,608.32
  5. Step 5: Solve for x
    x = 364,676,608.32/21,641.97
  6. Step 6: Final answer
    x = 16,850.43

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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.