Home / 2,178.75-3,019.34-2,137.20

Finding the Fourth Proportional to 2,178.75, 3,019.34 and 2,137.20

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Solution

The fourth proportional to 2,178.75, 3,019.34 and 2,137.20 is: 2,961.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.75 : 3,019.34 = 2,137.20 : x
  2. Step 2: Convert to fraction form
    2,178.75/3,019.34 = 2,137.20/x
  3. Step 3: Cross multiply
    2,178.75x = 3,019.34 × 2,137.20
  4. Step 4: Simplify right side
    2,178.75x = 6,452,944.45
  5. Step 5: Solve for x
    x = 6,452,944.45/2,178.75
  6. Step 6: Final answer
    x = 2,961.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.