Home / 4,979.67-6,871.77-2,989.05

Finding the Fourth Proportional to 4,979.67, 6,871.77 and 2,989.05

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Solution

The fourth proportional to 4,979.67, 6,871.77 and 2,989.05 is: 4,124.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.67 : 6,871.77 = 2,989.05 : x
  2. Step 2: Convert to fraction form
    4,979.67/6,871.77 = 2,989.05/x
  3. Step 3: Cross multiply
    4,979.67x = 6,871.77 × 2,989.05
  4. Step 4: Simplify right side
    4,979.67x = 20,540,064.12
  5. Step 5: Solve for x
    x = 20,540,064.12/4,979.67
  6. Step 6: Final answer
    x = 4,124.78

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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.