Home / 2,887.56-3,980.26-2,187.72

Finding the Fourth Proportional to 2,887.56, 3,980.26 and 2,187.72

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Solution

The fourth proportional to 2,887.56, 3,980.26 and 2,187.72 is: 3,015.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.56 : 3,980.26 = 2,187.72 : x
  2. Step 2: Convert to fraction form
    2,887.56/3,980.26 = 2,187.72/x
  3. Step 3: Cross multiply
    2,887.56x = 3,980.26 × 2,187.72
  4. Step 4: Simplify right side
    2,887.56x = 8,707,694.41
  5. Step 5: Solve for x
    x = 8,707,694.41/2,887.56
  6. Step 6: Final answer
    x = 3,015.59

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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.