Home / 2,789.51-3,845.41-2,125.20

Finding the Fourth Proportional to 2,789.51, 3,845.41 and 2,125.20

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Solution

The fourth proportional to 2,789.51, 3,845.41 and 2,125.20 is: 2,929.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.51 : 3,845.41 = 2,125.20 : x
  2. Step 2: Convert to fraction form
    2,789.51/3,845.41 = 2,125.20/x
  3. Step 3: Cross multiply
    2,789.51x = 3,845.41 × 2,125.20
  4. Step 4: Simplify right side
    2,789.51x = 8,172,274.44
  5. Step 5: Solve for x
    x = 8,172,274.44/2,789.51
  6. Step 6: Final answer
    x = 2,929.65

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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.