Home / 3,945.86-5,438.49-2,686.26

Finding the Fourth Proportional to 3,945.86, 5,438.49 and 2,686.26

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Solution

The fourth proportional to 3,945.86, 5,438.49 and 2,686.26 is: 3,702.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.86 : 5,438.49 = 2,686.26 : x
  2. Step 2: Convert to fraction form
    3,945.86/5,438.49 = 2,686.26/x
  3. Step 3: Cross multiply
    3,945.86x = 5,438.49 × 2,686.26
  4. Step 4: Simplify right side
    3,945.86x = 14,609,223.58
  5. Step 5: Solve for x
    x = 14,609,223.58/3,945.86
  6. Step 6: Final answer
    x = 3,702.41

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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.