Home / 8,781.78-13,165.38-4,099.38

Finding the Fourth Proportional to 8,781.78, 13,165.38 and 4,099.38

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Solution

The fourth proportional to 8,781.78, 13,165.38 and 4,099.38 is: 6,145.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.78 : 13,165.38 = 4,099.38 : x
  2. Step 2: Convert to fraction form
    8,781.78/13,165.38 = 4,099.38/x
  3. Step 3: Cross multiply
    8,781.78x = 13,165.38 × 4,099.38
  4. Step 4: Simplify right side
    8,781.78x = 53,969,895.46
  5. Step 5: Solve for x
    x = 53,969,895.46/8,781.78
  6. Step 6: Final answer
    x = 6,145.67

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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.