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Finding the Fourth Proportional to 18,853.97, 25,993.71 and 15,669.99

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Solution

The fourth proportional to 18,853.97, 25,993.71 and 15,669.99 is: 21,604.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,853.97 : 25,993.71 = 15,669.99 : x
  2. Step 2: Convert to fraction form
    18,853.97/25,993.71 = 15,669.99/x
  3. Step 3: Cross multiply
    18,853.97x = 25,993.71 × 15,669.99
  4. Step 4: Simplify right side
    18,853.97x = 407,321,175.76
  5. Step 5: Solve for x
    x = 407,321,175.76/18,853.97
  6. Step 6: Final answer
    x = 21,604.01

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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.