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Finding the Fourth Proportional to 14,318, 21,477 and 3,929.75

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Solution

The fourth proportional to 14,318, 21,477 and 3,929.75 is: 5,894.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,318 : 21,477 = 3,929.75 : x
  2. Step 2: Convert to fraction form
    14,318/21,477 = 3,929.75/x
  3. Step 3: Cross multiply
    14,318x = 21,477 × 3,929.75
  4. Step 4: Simplify right side
    14,318x = 84,399,240.75
  5. Step 5: Solve for x
    x = 84,399,240.75/14,318
  6. Step 6: Final answer
    x = 5,894.63

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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.