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Finding the Fourth Proportional to 21,732.70, 29,992.02 and 13,351.90

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Solution

The fourth proportional to 21,732.70, 29,992.02 and 13,351.90 is: 18,426.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,732.70 : 29,992.02 = 13,351.90 : x
  2. Step 2: Convert to fraction form
    21,732.70/29,992.02 = 13,351.90/x
  3. Step 3: Cross multiply
    21,732.70x = 29,992.02 × 13,351.90
  4. Step 4: Simplify right side
    21,732.70x = 400,450,451.84
  5. Step 5: Solve for x
    x = 400,450,451.84/21,732.70
  6. Step 6: Final answer
    x = 18,426.17

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1.5x scale

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.