Home / 3,918.34-5,407.04-2,149.90

Finding the Fourth Proportional to 3,918.34, 5,407.04 and 2,149.90

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Solution

The fourth proportional to 3,918.34, 5,407.04 and 2,149.90 is: 2,966.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.34 : 5,407.04 = 2,149.90 : x
  2. Step 2: Convert to fraction form
    3,918.34/5,407.04 = 2,149.90/x
  3. Step 3: Cross multiply
    3,918.34x = 5,407.04 × 2,149.90
  4. Step 4: Simplify right side
    3,918.34x = 11,624,595.30
  5. Step 5: Solve for x
    x = 11,624,595.30/3,918.34
  6. Step 6: Final answer
    x = 2,966.71

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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.