Home / 3,987.96-5,503.32-2,219.70

Finding the Fourth Proportional to 3,987.96, 5,503.32 and 2,219.70

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Solution

The fourth proportional to 3,987.96, 5,503.32 and 2,219.70 is: 3,063.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.96 : 5,503.32 = 2,219.70 : x
  2. Step 2: Convert to fraction form
    3,987.96/5,503.32 = 2,219.70/x
  3. Step 3: Cross multiply
    3,987.96x = 5,503.32 × 2,219.70
  4. Step 4: Simplify right side
    3,987.96x = 12,215,719.40
  5. Step 5: Solve for x
    x = 12,215,719.40/3,987.96
  6. Step 6: Final answer
    x = 3,063.15

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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.