Home / 3,979.63-5,487.46-2,720.89

Finding the Fourth Proportional to 3,979.63, 5,487.46 and 2,720.89

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Solution

The fourth proportional to 3,979.63, 5,487.46 and 2,720.89 is: 3,751.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.63 : 5,487.46 = 2,720.89 : x
  2. Step 2: Convert to fraction form
    3,979.63/5,487.46 = 2,720.89/x
  3. Step 3: Cross multiply
    3,979.63x = 5,487.46 × 2,720.89
  4. Step 4: Simplify right side
    3,979.63x = 14,930,775.04
  5. Step 5: Solve for x
    x = 14,930,775.04/3,979.63
  6. Step 6: Final answer
    x = 3,751.80

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1.5x scale

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.