Home / 4,979.64-6,872.94-2,990.28

Finding the Fourth Proportional to 4,979.64, 6,872.94 and 2,990.28

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Solution

The fourth proportional to 4,979.64, 6,872.94 and 2,990.28 is: 4,127.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.64 : 6,872.94 = 2,990.28 : x
  2. Step 2: Convert to fraction form
    4,979.64/6,872.94 = 2,990.28/x
  3. Step 3: Cross multiply
    4,979.64x = 6,872.94 × 2,990.28
  4. Step 4: Simplify right side
    4,979.64x = 20,552,015.02
  5. Step 5: Solve for x
    x = 20,552,015.02/4,979.64
  6. Step 6: Final answer
    x = 4,127.21

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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.