Home / 4,979.79-6,871.16-2,989.62

Finding the Fourth Proportional to 4,979.79, 6,871.16 and 2,989.62

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Solution

The fourth proportional to 4,979.79, 6,871.16 and 2,989.62 is: 4,125.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.79 : 6,871.16 = 2,989.62 : x
  2. Step 2: Convert to fraction form
    4,979.79/6,871.16 = 2,989.62/x
  3. Step 3: Cross multiply
    4,979.79x = 6,871.16 × 2,989.62
  4. Step 4: Simplify right side
    4,979.79x = 20,542,164.83
  5. Step 5: Solve for x
    x = 20,542,164.83/4,979.79
  6. Step 6: Final answer
    x = 4,125.11

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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.