Home / 12,768.12-17,619.90-7,179

Finding the Fourth Proportional to 12,768.12, 17,619.90 and 7,179

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Solution

The fourth proportional to 12,768.12, 17,619.90 and 7,179 is: 9,906.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,768.12 : 17,619.90 = 7,179 : x
  2. Step 2: Convert to fraction form
    12,768.12/17,619.90 = 7,179/x
  3. Step 3: Cross multiply
    12,768.12x = 17,619.90 × 7,179
  4. Step 4: Simplify right side
    12,768.12x = 126,493,262.10
  5. Step 5: Solve for x
    x = 126,493,262.10/12,768.12
  6. Step 6: Final answer
    x = 9,906.96

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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.