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Finding the Fourth Proportional to 18,813.97, 25,963.78 and 10,636.93

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Solution

The fourth proportional to 18,813.97, 25,963.78 and 10,636.93 is: 14,679.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.97 : 25,963.78 = 10,636.93 : x
  2. Step 2: Convert to fraction form
    18,813.97/25,963.78 = 10,636.93/x
  3. Step 3: Cross multiply
    18,813.97x = 25,963.78 × 10,636.93
  4. Step 4: Simplify right side
    18,813.97x = 276,174,910.40
  5. Step 5: Solve for x
    x = 276,174,910.40/18,813.97
  6. Step 6: Final answer
    x = 14,679.25

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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.