Home / 2,151.87-3,245.01-2,122.61

Finding the Fourth Proportional to 2,151.87, 3,245.01 and 2,122.61

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Solution

The fourth proportional to 2,151.87, 3,245.01 and 2,122.61 is: 3,200.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.87 : 3,245.01 = 2,122.61 : x
  2. Step 2: Convert to fraction form
    2,151.87/3,245.01 = 2,122.61/x
  3. Step 3: Cross multiply
    2,151.87x = 3,245.01 × 2,122.61
  4. Step 4: Simplify right side
    2,151.87x = 6,887,878.43
  5. Step 5: Solve for x
    x = 6,887,878.43/2,151.87
  6. Step 6: Final answer
    x = 3,200.89

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.