Home / 2,118.57-2,922.65-1,372.79

Finding the Fourth Proportional to 2,118.57, 2,922.65 and 1,372.79

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Solution

The fourth proportional to 2,118.57, 2,922.65 and 1,372.79 is: 1,893.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.57 : 2,922.65 = 1,372.79 : x
  2. Step 2: Convert to fraction form
    2,118.57/2,922.65 = 1,372.79/x
  3. Step 3: Cross multiply
    2,118.57x = 2,922.65 × 1,372.79
  4. Step 4: Simplify right side
    2,118.57x = 4,012,163.22
  5. Step 5: Solve for x
    x = 4,012,163.22/2,118.57
  6. Step 6: Final answer
    x = 1,893.81

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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.