Home / 21,687.62-29,928.69-13,736.35

Finding the Fourth Proportional to 21,687.62, 29,928.69 and 13,736.35

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Solution

The fourth proportional to 21,687.62, 29,928.69 and 13,736.35 is: 18,956.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,687.62 : 29,928.69 = 13,736.35 : x
  2. Step 2: Convert to fraction form
    21,687.62/29,928.69 = 13,736.35/x
  3. Step 3: Cross multiply
    21,687.62x = 29,928.69 × 13,736.35
  4. Step 4: Simplify right side
    21,687.62x = 411,110,998.29
  5. Step 5: Solve for x
    x = 411,110,998.29/21,687.62
  6. Step 6: Final answer
    x = 18,956.03

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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.