Home / 3,987.62-5,502.23-2,218.88

Finding the Fourth Proportional to 3,987.62, 5,502.23 and 2,218.88

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Solution

The fourth proportional to 3,987.62, 5,502.23 and 2,218.88 is: 3,061.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.62 : 5,502.23 = 2,218.88 : x
  2. Step 2: Convert to fraction form
    3,987.62/5,502.23 = 2,218.88/x
  3. Step 3: Cross multiply
    3,987.62x = 5,502.23 × 2,218.88
  4. Step 4: Simplify right side
    3,987.62x = 12,208,749.50
  5. Step 5: Solve for x
    x = 12,208,749.50/3,987.62
  6. Step 6: Final answer
    x = 3,061.67

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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.