Home / 12,491.72-18,739.83-4,170.92

Finding the Fourth Proportional to 12,491.72, 18,739.83 and 4,170.92

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Solution

The fourth proportional to 12,491.72, 18,739.83 and 4,170.92 is: 6,257.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.72 : 18,739.83 = 4,170.92 : x
  2. Step 2: Convert to fraction form
    12,491.72/18,739.83 = 4,170.92/x
  3. Step 3: Cross multiply
    12,491.72x = 18,739.83 × 4,170.92
  4. Step 4: Simplify right side
    12,491.72x = 78,162,331.74
  5. Step 5: Solve for x
    x = 78,162,331.74/12,491.72
  6. Step 6: Final answer
    x = 6,257.13

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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.