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Finding the Fourth Proportional to 14,153, 21,229.50 and 4,425

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Solution

The fourth proportional to 14,153, 21,229.50 and 4,425 is: 6,637.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,153 : 21,229.50 = 4,425 : x
  2. Step 2: Convert to fraction form
    14,153/21,229.50 = 4,425/x
  3. Step 3: Cross multiply
    14,153x = 21,229.50 × 4,425
  4. Step 4: Simplify right side
    14,153x = 93,940,537.50
  5. Step 5: Solve for x
    x = 93,940,537.50/14,153
  6. Step 6: Final answer
    x = 6,637.50

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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.