Home / 3,987.10-5,969.85-3,123.10

Finding the Fourth Proportional to 3,987.10, 5,969.85 and 3,123.10

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Solution

The fourth proportional to 3,987.10, 5,969.85 and 3,123.10 is: 4,676.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.10 : 5,969.85 = 3,123.10 : x
  2. Step 2: Convert to fraction form
    3,987.10/5,969.85 = 3,123.10/x
  3. Step 3: Cross multiply
    3,987.10x = 5,969.85 × 3,123.10
  4. Step 4: Simplify right side
    3,987.10x = 18,644,438.54
  5. Step 5: Solve for x
    x = 18,644,438.54/3,987.10
  6. Step 6: Final answer
    x = 4,676.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.