Home / 2,841.12-3,920.88-2,141.28

Finding the Fourth Proportional to 2,841.12, 3,920.88 and 2,141.28

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Solution

The fourth proportional to 2,841.12, 3,920.88 and 2,141.28 is: 2,955.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,841.12 : 3,920.88 = 2,141.28 : x
  2. Step 2: Convert to fraction form
    2,841.12/3,920.88 = 2,141.28/x
  3. Step 3: Cross multiply
    2,841.12x = 3,920.88 × 2,141.28
  4. Step 4: Simplify right side
    2,841.12x = 8,395,701.93
  5. Step 5: Solve for x
    x = 8,395,701.93/2,841.12
  6. Step 6: Final answer
    x = 2,955.07

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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.