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Finding the Fourth Proportional to 18,803.97, 25,940.25 and 15,818.70

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Solution

The fourth proportional to 18,803.97, 25,940.25 and 15,818.70 is: 21,822.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.97 : 25,940.25 = 15,818.70 : x
  2. Step 2: Convert to fraction form
    18,803.97/25,940.25 = 15,818.70/x
  3. Step 3: Cross multiply
    18,803.97x = 25,940.25 × 15,818.70
  4. Step 4: Simplify right side
    18,803.97x = 410,341,032.68
  5. Step 5: Solve for x
    x = 410,341,032.68/18,803.97
  6. Step 6: Final answer
    x = 21,822.04

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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.