Home / 13,131.33-19,680.58-8,438.85

Finding the Fourth Proportional to 13,131.33, 19,680.58 and 8,438.85

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Solution

The fourth proportional to 13,131.33, 19,680.58 and 8,438.85 is: 12,647.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.33 : 19,680.58 = 8,438.85 : x
  2. Step 2: Convert to fraction form
    13,131.33/19,680.58 = 8,438.85/x
  3. Step 3: Cross multiply
    13,131.33x = 19,680.58 × 8,438.85
  4. Step 4: Simplify right side
    13,131.33x = 166,081,473.08
  5. Step 5: Solve for x
    x = 166,081,473.08/13,131.33
  6. Step 6: Final answer
    x = 12,647.73

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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.