Home / 3,918.25-5,407-2,347.21

Finding the Fourth Proportional to 3,918.25, 5,407 and 2,347.21

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Solution

The fourth proportional to 3,918.25, 5,407 and 2,347.21 is: 3,239.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.25 : 5,407 = 2,347.21 : x
  2. Step 2: Convert to fraction form
    3,918.25/5,407 = 2,347.21/x
  3. Step 3: Cross multiply
    3,918.25x = 5,407 × 2,347.21
  4. Step 4: Simplify right side
    3,918.25x = 12,691,364.47
  5. Step 5: Solve for x
    x = 12,691,364.47/3,918.25
  6. Step 6: Final answer
    x = 3,239.04

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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.