Home / 3,987.14-5,502.17-2,218.77

Finding the Fourth Proportional to 3,987.14, 5,502.17 and 2,218.77

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Solution

The fourth proportional to 3,987.14, 5,502.17 and 2,218.77 is: 3,061.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.14 : 5,502.17 = 2,218.77 : x
  2. Step 2: Convert to fraction form
    3,987.14/5,502.17 = 2,218.77/x
  3. Step 3: Cross multiply
    3,987.14x = 5,502.17 × 2,218.77
  4. Step 4: Simplify right side
    3,987.14x = 12,208,038.64
  5. Step 5: Solve for x
    x = 12,208,038.64/3,987.14
  6. Step 6: Final answer
    x = 3,061.86

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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.