Home / 5,170.80-7,135.60-2,813

Finding the Fourth Proportional to 5,170.80, 7,135.60 and 2,813

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Solution

The fourth proportional to 5,170.80, 7,135.60 and 2,813 is: 3,881.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,170.80 : 7,135.60 = 2,813 : x
  2. Step 2: Convert to fraction form
    5,170.80/7,135.60 = 2,813/x
  3. Step 3: Cross multiply
    5,170.80x = 7,135.60 × 2,813
  4. Step 4: Simplify right side
    5,170.80x = 20,072,442.80
  5. Step 5: Solve for x
    x = 20,072,442.80/5,170.80
  6. Step 6: Final answer
    x = 3,881.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.