Home / 7,987.05-11,980.57-2,143.66

Finding the Fourth Proportional to 7,987.05, 11,980.57 and 2,143.66

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Solution

The fourth proportional to 7,987.05, 11,980.57 and 2,143.66 is: 3,215.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.05 : 11,980.57 = 2,143.66 : x
  2. Step 2: Convert to fraction form
    7,987.05/11,980.57 = 2,143.66/x
  3. Step 3: Cross multiply
    7,987.05x = 11,980.57 × 2,143.66
  4. Step 4: Simplify right side
    7,987.05x = 25,682,232.28
  5. Step 5: Solve for x
    x = 25,682,232.28/7,987.05
  6. Step 6: Final answer
    x = 3,215.49

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.