Home / 2,820.36-3,891.51-2,148.03

Finding the Fourth Proportional to 2,820.36, 3,891.51 and 2,148.03

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Solution

The fourth proportional to 2,820.36, 3,891.51 and 2,148.03 is: 2,963.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.36 : 3,891.51 = 2,148.03 : x
  2. Step 2: Convert to fraction form
    2,820.36/3,891.51 = 2,148.03/x
  3. Step 3: Cross multiply
    2,820.36x = 3,891.51 × 2,148.03
  4. Step 4: Simplify right side
    2,820.36x = 8,359,080.23
  5. Step 5: Solve for x
    x = 8,359,080.23/2,820.36
  6. Step 6: Final answer
    x = 2,963.83

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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.