Home / 3,186.56-4,398.82-2,987.30

Finding the Fourth Proportional to 3,186.56, 4,398.82 and 2,987.30

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Solution

The fourth proportional to 3,186.56, 4,398.82 and 2,987.30 is: 4,123.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.56 : 4,398.82 = 2,987.30 : x
  2. Step 2: Convert to fraction form
    3,186.56/4,398.82 = 2,987.30/x
  3. Step 3: Cross multiply
    3,186.56x = 4,398.82 × 2,987.30
  4. Step 4: Simplify right side
    3,186.56x = 13,140,594.99
  5. Step 5: Solve for x
    x = 13,140,594.99/3,186.56
  6. Step 6: Final answer
    x = 4,123.76

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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.