Home / 3,887.08-5,364.17-2,118.70

Finding the Fourth Proportional to 3,887.08, 5,364.17 and 2,118.70

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Solution

The fourth proportional to 3,887.08, 5,364.17 and 2,118.70 is: 2,923.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.08 : 5,364.17 = 2,118.70 : x
  2. Step 2: Convert to fraction form
    3,887.08/5,364.17 = 2,118.70/x
  3. Step 3: Cross multiply
    3,887.08x = 5,364.17 × 2,118.70
  4. Step 4: Simplify right side
    3,887.08x = 11,365,029.56
  5. Step 5: Solve for x
    x = 11,365,029.56/3,887.08
  6. Step 6: Final answer
    x = 2,923.80

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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.