Home / 4,980.88-6,878.28-3,121.12

Finding the Fourth Proportional to 4,980.88, 6,878.28 and 3,121.12

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Solution

The fourth proportional to 4,980.88, 6,878.28 and 3,121.12 is: 4,310.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,980.88 : 6,878.28 = 3,121.12 : x
  2. Step 2: Convert to fraction form
    4,980.88/6,878.28 = 3,121.12/x
  3. Step 3: Cross multiply
    4,980.88x = 6,878.28 × 3,121.12
  4. Step 4: Simplify right side
    4,980.88x = 21,467,937.27
  5. Step 5: Solve for x
    x = 21,467,937.27/4,980.88
  6. Step 6: Final answer
    x = 4,310.07

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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.