Home / 3,720.65-5,135.60-2,149.79

Finding the Fourth Proportional to 3,720.65, 5,135.60 and 2,149.79

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Solution

The fourth proportional to 3,720.65, 5,135.60 and 2,149.79 is: 2,967.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.65 : 5,135.60 = 2,149.79 : x
  2. Step 2: Convert to fraction form
    3,720.65/5,135.60 = 2,149.79/x
  3. Step 3: Cross multiply
    3,720.65x = 5,135.60 × 2,149.79
  4. Step 4: Simplify right side
    3,720.65x = 11,040,461.52
  5. Step 5: Solve for x
    x = 11,040,461.52/3,720.65
  6. Step 6: Final answer
    x = 2,967.35

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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.