Home / 3,887.21-5,364.48-2,118.87

Finding the Fourth Proportional to 3,887.21, 5,364.48 and 2,118.87

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Solution

The fourth proportional to 3,887.21, 5,364.48 and 2,118.87 is: 2,924.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.21 : 5,364.48 = 2,118.87 : x
  2. Step 2: Convert to fraction form
    3,887.21/5,364.48 = 2,118.87/x
  3. Step 3: Cross multiply
    3,887.21x = 5,364.48 × 2,118.87
  4. Step 4: Simplify right side
    3,887.21x = 11,366,635.74
  5. Step 5: Solve for x
    x = 11,366,635.74/3,887.21
  6. Step 6: Final answer
    x = 2,924.12

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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.