Home / 2,117.89-3,161.37-1,961.56

Finding the Fourth Proportional to 2,117.89, 3,161.37 and 1,961.56

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Solution

The fourth proportional to 2,117.89, 3,161.37 and 1,961.56 is: 2,928.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.89 : 3,161.37 = 1,961.56 : x
  2. Step 2: Convert to fraction form
    2,117.89/3,161.37 = 1,961.56/x
  3. Step 3: Cross multiply
    2,117.89x = 3,161.37 × 1,961.56
  4. Step 4: Simplify right side
    2,117.89x = 6,201,203.11
  5. Step 5: Solve for x
    x = 6,201,203.11/2,117.89
  6. Step 6: Final answer
    x = 2,928.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.