Home / 2,887.62-3,984.91-1,561.33

Finding the Fourth Proportional to 2,887.62, 3,984.91 and 1,561.33

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Solution

The fourth proportional to 2,887.62, 3,984.91 and 1,561.33 is: 2,154.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.62 : 3,984.91 = 1,561.33 : x
  2. Step 2: Convert to fraction form
    2,887.62/3,984.91 = 1,561.33/x
  3. Step 3: Cross multiply
    2,887.62x = 3,984.91 × 1,561.33
  4. Step 4: Simplify right side
    2,887.62x = 6,221,759.53
  5. Step 5: Solve for x
    x = 6,221,759.53/2,887.62
  6. Step 6: Final answer
    x = 2,154.63

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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.