Home / 3,918.36-5,407.38-2,239.74

Finding the Fourth Proportional to 3,918.36, 5,407.38 and 2,239.74

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Solution

The fourth proportional to 3,918.36, 5,407.38 and 2,239.74 is: 3,090.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.36 : 5,407.38 = 2,239.74 : x
  2. Step 2: Convert to fraction form
    3,918.36/5,407.38 = 2,239.74/x
  3. Step 3: Cross multiply
    3,918.36x = 5,407.38 × 2,239.74
  4. Step 4: Simplify right side
    3,918.36x = 12,111,125.28
  5. Step 5: Solve for x
    x = 12,111,125.28/3,918.36
  6. Step 6: Final answer
    x = 3,090.87

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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.