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Finding the Fourth Proportional to 18,801.29, 25,949.44 and 12,428.24

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Solution

The fourth proportional to 18,801.29, 25,949.44 and 12,428.24 is: 17,153.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.29 : 25,949.44 = 12,428.24 : x
  2. Step 2: Convert to fraction form
    18,801.29/25,949.44 = 12,428.24/x
  3. Step 3: Cross multiply
    18,801.29x = 25,949.44 × 12,428.24
  4. Step 4: Simplify right side
    18,801.29x = 322,505,719.02
  5. Step 5: Solve for x
    x = 322,505,719.02/18,801.29
  6. Step 6: Final answer
    x = 17,153.38

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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.