Home / 7,822.55-11,731.43-3,140.09

Finding the Fourth Proportional to 7,822.55, 11,731.43 and 3,140.09

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Solution

The fourth proportional to 7,822.55, 11,731.43 and 3,140.09 is: 4,709.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,822.55 : 11,731.43 = 3,140.09 : x
  2. Step 2: Convert to fraction form
    7,822.55/11,731.43 = 3,140.09/x
  3. Step 3: Cross multiply
    7,822.55x = 11,731.43 × 3,140.09
  4. Step 4: Simplify right side
    7,822.55x = 36,837,772.21
  5. Step 5: Solve for x
    x = 36,837,772.21/7,822.55
  6. Step 6: Final answer
    x = 4,709.18

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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.