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Finding the Fourth Proportional to 21,624.76, 29,843.05 and 13,664.08

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Solution

The fourth proportional to 21,624.76, 29,843.05 and 13,664.08 is: 18,856.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,624.76 : 29,843.05 = 13,664.08 : x
  2. Step 2: Convert to fraction form
    21,624.76/29,843.05 = 13,664.08/x
  3. Step 3: Cross multiply
    21,624.76x = 29,843.05 × 13,664.08
  4. Step 4: Simplify right side
    21,624.76x = 407,777,673.43
  5. Step 5: Solve for x
    x = 407,777,673.43/21,624.76
  6. Step 6: Final answer
    x = 18,856.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.