Home / 3,889.80-5,358.48-2,893.35

Finding the Fourth Proportional to 3,889.80, 5,358.48 and 2,893.35

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Solution

The fourth proportional to 3,889.80, 5,358.48 and 2,893.35 is: 3,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.80 : 5,358.48 = 2,893.35 : x
  2. Step 2: Convert to fraction form
    3,889.80/5,358.48 = 2,893.35/x
  3. Step 3: Cross multiply
    3,889.80x = 5,358.48 × 2,893.35
  4. Step 4: Simplify right side
    3,889.80x = 15,503,958.11
  5. Step 5: Solve for x
    x = 15,503,958.11/3,889.80
  6. Step 6: Final answer
    x = 3,985.80

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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.