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Finding the Fourth Proportional to 18,763.31, 28,153.14 and 11,759.38

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Solution

The fourth proportional to 18,763.31, 28,153.14 and 11,759.38 is: 17,644.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.31 : 28,153.14 = 11,759.38 : x
  2. Step 2: Convert to fraction form
    18,763.31/28,153.14 = 11,759.38/x
  3. Step 3: Cross multiply
    18,763.31x = 28,153.14 × 11,759.38
  4. Step 4: Simplify right side
    18,763.31x = 331,063,356.97
  5. Step 5: Solve for x
    x = 331,063,356.97/18,763.31
  6. Step 6: Final answer
    x = 17,644.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.