Home / 11,785.72-17,681.19-3,890.67

Finding the Fourth Proportional to 11,785.72, 17,681.19 and 3,890.67

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Solution

The fourth proportional to 11,785.72, 17,681.19 and 3,890.67 is: 5,836.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,785.72 : 17,681.19 = 3,890.67 : x
  2. Step 2: Convert to fraction form
    11,785.72/17,681.19 = 3,890.67/x
  3. Step 3: Cross multiply
    11,785.72x = 17,681.19 × 3,890.67
  4. Step 4: Simplify right side
    11,785.72x = 68,791,743.79
  5. Step 5: Solve for x
    x = 68,791,743.79/11,785.72
  6. Step 6: Final answer
    x = 5,836.87

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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.