Home / 5,119.43-7,679.15-1,421.66

Finding the Fourth Proportional to 5,119.43, 7,679.15 and 1,421.66

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Solution

The fourth proportional to 5,119.43, 7,679.15 and 1,421.66 is: 2,132.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.43 : 7,679.15 = 1,421.66 : x
  2. Step 2: Convert to fraction form
    5,119.43/7,679.15 = 1,421.66/x
  3. Step 3: Cross multiply
    5,119.43x = 7,679.15 × 1,421.66
  4. Step 4: Simplify right side
    5,119.43x = 10,917,133.28
  5. Step 5: Solve for x
    x = 10,917,133.28/5,119.43
  6. Step 6: Final answer
    x = 2,132.49

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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.