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Finding the Fourth Proportional to 14,388.79, 21,586.28 and 8,151.79

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Solution

The fourth proportional to 14,388.79, 21,586.28 and 8,151.79 is: 12,229.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,388.79 : 21,586.28 = 8,151.79 : x
  2. Step 2: Convert to fraction form
    14,388.79/21,586.28 = 8,151.79/x
  3. Step 3: Cross multiply
    14,388.79x = 21,586.28 × 8,151.79
  4. Step 4: Simplify right side
    14,388.79x = 175,966,807.67
  5. Step 5: Solve for x
    x = 175,966,807.67/14,388.79
  6. Step 6: Final answer
    x = 12,229.44

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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.