Home / 2,021.71-2,789.90-1,137.56

Finding the Fourth Proportional to 2,021.71, 2,789.90 and 1,137.56

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Solution

The fourth proportional to 2,021.71, 2,789.90 and 1,137.56 is: 1,569.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,021.71 : 2,789.90 = 1,137.56 : x
  2. Step 2: Convert to fraction form
    2,021.71/2,789.90 = 1,137.56/x
  3. Step 3: Cross multiply
    2,021.71x = 2,789.90 × 1,137.56
  4. Step 4: Simplify right side
    2,021.71x = 3,173,685.62
  5. Step 5: Solve for x
    x = 3,173,685.62/2,021.71
  6. Step 6: Final answer
    x = 1,569.80

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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.