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Finding the Fourth Proportional to 28,250, 38,991.90 and 16,311.56

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Solution

The fourth proportional to 28,250, 38,991.90 and 16,311.56 is: 22,513.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,250 : 38,991.90 = 16,311.56 : x
  2. Step 2: Convert to fraction form
    28,250/38,991.90 = 16,311.56/x
  3. Step 3: Cross multiply
    28,250x = 38,991.90 × 16,311.56
  4. Step 4: Simplify right side
    28,250x = 636,018,716.36
  5. Step 5: Solve for x
    x = 636,018,716.36/28,250
  6. Step 6: Final answer
    x = 22,513.94

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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.