Home / 3,987.16-5,501.66-2,218.76

Finding the Fourth Proportional to 3,987.16, 5,501.66 and 2,218.76

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Solution

The fourth proportional to 3,987.16, 5,501.66 and 2,218.76 is: 3,061.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.16 : 5,501.66 = 2,218.76 : x
  2. Step 2: Convert to fraction form
    3,987.16/5,501.66 = 2,218.76/x
  3. Step 3: Cross multiply
    3,987.16x = 5,501.66 × 2,218.76
  4. Step 4: Simplify right side
    3,987.16x = 12,206,863.14
  5. Step 5: Solve for x
    x = 12,206,863.14/3,987.16
  6. Step 6: Final answer
    x = 3,061.54

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Half scale
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Double scale
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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.