Home / 20,717.21-31,102.92-12,299.09

Finding the Fourth Proportional to 20,717.21, 31,102.92 and 12,299.09

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Solution

The fourth proportional to 20,717.21, 31,102.92 and 12,299.09 is: 18,464.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.21 : 31,102.92 = 12,299.09 : x
  2. Step 2: Convert to fraction form
    20,717.21/31,102.92 = 12,299.09/x
  3. Step 3: Cross multiply
    20,717.21x = 31,102.92 × 12,299.09
  4. Step 4: Simplify right side
    20,717.21x = 382,537,456.83
  5. Step 5: Solve for x
    x = 382,537,456.83/20,717.21
  6. Step 6: Final answer
    x = 18,464.72

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1.5x scale

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.