Home / 3,918.73-5,402.85-2,858.04

Finding the Fourth Proportional to 3,918.73, 5,402.85 and 2,858.04

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Solution

The fourth proportional to 3,918.73, 5,402.85 and 2,858.04 is: 3,940.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.73 : 5,402.85 = 2,858.04 : x
  2. Step 2: Convert to fraction form
    3,918.73/5,402.85 = 2,858.04/x
  3. Step 3: Cross multiply
    3,918.73x = 5,402.85 × 2,858.04
  4. Step 4: Simplify right side
    3,918.73x = 15,441,561.41
  5. Step 5: Solve for x
    x = 15,441,561.41/3,918.73
  6. Step 6: Final answer
    x = 3,940.45

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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.