Home / 20,936.64-31,363.92-12,153.12

Finding the Fourth Proportional to 20,936.64, 31,363.92 and 12,153.12

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Solution

The fourth proportional to 20,936.64, 31,363.92 and 12,153.12 is: 18,205.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.64 : 31,363.92 = 12,153.12 : x
  2. Step 2: Convert to fraction form
    20,936.64/31,363.92 = 12,153.12/x
  3. Step 3: Cross multiply
    20,936.64x = 31,363.92 × 12,153.12
  4. Step 4: Simplify right side
    20,936.64x = 381,169,483.43
  5. Step 5: Solve for x
    x = 381,169,483.43/20,936.64
  6. Step 6: Final answer
    x = 18,205.86

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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.