Home / 2,721.80-3,758.20-2,091.32

Finding the Fourth Proportional to 2,721.80, 3,758.20 and 2,091.32

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Solution

The fourth proportional to 2,721.80, 3,758.20 and 2,091.32 is: 2,887.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,721.80 : 3,758.20 = 2,091.32 : x
  2. Step 2: Convert to fraction form
    2,721.80/3,758.20 = 2,091.32/x
  3. Step 3: Cross multiply
    2,721.80x = 3,758.20 × 2,091.32
  4. Step 4: Simplify right side
    2,721.80x = 7,859,588.90
  5. Step 5: Solve for x
    x = 7,859,588.90/2,721.80
  6. Step 6: Final answer
    x = 2,887.64

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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.