Home / 12,515.27-18,778.10-5,491.62

Finding the Fourth Proportional to 12,515.27, 18,778.10 and 5,491.62

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Solution

The fourth proportional to 12,515.27, 18,778.10 and 5,491.62 is: 8,239.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,515.27 : 18,778.10 = 5,491.62 : x
  2. Step 2: Convert to fraction form
    12,515.27/18,778.10 = 5,491.62/x
  3. Step 3: Cross multiply
    12,515.27x = 18,778.10 × 5,491.62
  4. Step 4: Simplify right side
    12,515.27x = 103,122,162.06
  5. Step 5: Solve for x
    x = 103,122,162.06/12,515.27
  6. Step 6: Final answer
    x = 8,239.71

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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.