Home / 3,918.23-5,402.16-2,857.54

Finding the Fourth Proportional to 3,918.23, 5,402.16 and 2,857.54

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Solution

The fourth proportional to 3,918.23, 5,402.16 and 2,857.54 is: 3,939.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.23 : 5,402.16 = 2,857.54 : x
  2. Step 2: Convert to fraction form
    3,918.23/5,402.16 = 2,857.54/x
  3. Step 3: Cross multiply
    3,918.23x = 5,402.16 × 2,857.54
  4. Step 4: Simplify right side
    3,918.23x = 15,436,888.29
  5. Step 5: Solve for x
    x = 15,436,888.29/3,918.23
  6. Step 6: Final answer
    x = 3,939.76

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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.