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Finding the Fourth Proportional to 28,251, 42,391.08 and 14,400

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Solution

The fourth proportional to 28,251, 42,391.08 and 14,400 is: 21,607.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,251 : 42,391.08 = 14,400 : x
  2. Step 2: Convert to fraction form
    28,251/42,391.08 = 14,400/x
  3. Step 3: Cross multiply
    28,251x = 42,391.08 × 14,400
  4. Step 4: Simplify right side
    28,251x = 610,431,552
  5. Step 5: Solve for x
    x = 610,431,552/28,251
  6. Step 6: Final answer
    x = 21,607.43

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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.