Home / 3,887.12-5,364.23-2,118.70

Finding the Fourth Proportional to 3,887.12, 5,364.23 and 2,118.70

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Solution

The fourth proportional to 3,887.12, 5,364.23 and 2,118.70 is: 2,923.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.12 : 5,364.23 = 2,118.70 : x
  2. Step 2: Convert to fraction form
    3,887.12/5,364.23 = 2,118.70/x
  3. Step 3: Cross multiply
    3,887.12x = 5,364.23 × 2,118.70
  4. Step 4: Simplify right side
    3,887.12x = 11,365,194.10
  5. Step 5: Solve for x
    x = 11,365,194.10/3,887.12
  6. Step 6: Final answer
    x = 2,923.81

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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.