Home / 3,917.34-5,405.66-2,148.90

Finding the Fourth Proportional to 3,917.34, 5,405.66 and 2,148.90

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Solution

The fourth proportional to 3,917.34, 5,405.66 and 2,148.90 is: 2,965.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.34 : 5,405.66 = 2,148.90 : x
  2. Step 2: Convert to fraction form
    3,917.34/5,405.66 = 2,148.90/x
  3. Step 3: Cross multiply
    3,917.34x = 5,405.66 × 2,148.90
  4. Step 4: Simplify right side
    3,917.34x = 11,616,222.77
  5. Step 5: Solve for x
    x = 11,616,222.77/3,917.34
  6. Step 6: Final answer
    x = 2,965.33

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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.