Home / 8,695.20-13,039.70-3,147.11

Finding the Fourth Proportional to 8,695.20, 13,039.70 and 3,147.11

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Solution

The fourth proportional to 8,695.20, 13,039.70 and 3,147.11 is: 4,719.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,695.20 : 13,039.70 = 3,147.11 : x
  2. Step 2: Convert to fraction form
    8,695.20/13,039.70 = 3,147.11/x
  3. Step 3: Cross multiply
    8,695.20x = 13,039.70 × 3,147.11
  4. Step 4: Simplify right side
    8,695.20x = 41,037,312.94
  5. Step 5: Solve for x
    x = 41,037,312.94/8,695.20
  6. Step 6: Final answer
    x = 4,719.54

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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.