Home / 3,918.12-5,407.56-2,239.88

Finding the Fourth Proportional to 3,918.12, 5,407.56 and 2,239.88

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Solution

The fourth proportional to 3,918.12, 5,407.56 and 2,239.88 is: 3,091.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.12 : 5,407.56 = 2,239.88 : x
  2. Step 2: Convert to fraction form
    3,918.12/5,407.56 = 2,239.88/x
  3. Step 3: Cross multiply
    3,918.12x = 5,407.56 × 2,239.88
  4. Step 4: Simplify right side
    3,918.12x = 12,112,285.49
  5. Step 5: Solve for x
    x = 12,112,285.49/3,918.12
  6. Step 6: Final answer
    x = 3,091.35

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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.