Home / 3,871.78-5,343.90-2,545.60

Finding the Fourth Proportional to 3,871.78, 5,343.90 and 2,545.60

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Solution

The fourth proportional to 3,871.78, 5,343.90 and 2,545.60 is: 3,513.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.78 : 5,343.90 = 2,545.60 : x
  2. Step 2: Convert to fraction form
    3,871.78/5,343.90 = 2,545.60/x
  3. Step 3: Cross multiply
    3,871.78x = 5,343.90 × 2,545.60
  4. Step 4: Simplify right side
    3,871.78x = 13,603,431.84
  5. Step 5: Solve for x
    x = 13,603,431.84/3,871.78
  6. Step 6: Final answer
    x = 3,513.48

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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.