Home / 3,709.12-5,118.51-2,115.66

Finding the Fourth Proportional to 3,709.12, 5,118.51 and 2,115.66

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Solution

The fourth proportional to 3,709.12, 5,118.51 and 2,115.66 is: 2,919.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,709.12 : 5,118.51 = 2,115.66 : x
  2. Step 2: Convert to fraction form
    3,709.12/5,118.51 = 2,115.66/x
  3. Step 3: Cross multiply
    3,709.12x = 5,118.51 × 2,115.66
  4. Step 4: Simplify right side
    3,709.12x = 10,829,026.87
  5. Step 5: Solve for x
    x = 10,829,026.87/3,709.12
  6. Step 6: Final answer
    x = 2,919.57

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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.