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Finding the Fourth Proportional to 14,478, 21,717.09 and 4,089.84

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Solution

The fourth proportional to 14,478, 21,717.09 and 4,089.84 is: 6,134.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,478 : 21,717.09 = 4,089.84 : x
  2. Step 2: Convert to fraction form
    14,478/21,717.09 = 4,089.84/x
  3. Step 3: Cross multiply
    14,478x = 21,717.09 × 4,089.84
  4. Step 4: Simplify right side
    14,478x = 88,819,423.37
  5. Step 5: Solve for x
    x = 88,819,423.37/14,478
  6. Step 6: Final answer
    x = 6,134.79

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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.