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Finding the Fourth Proportional to 5,720.33, 7,863.69 and 4,920.72

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Solution

The fourth proportional to 5,720.33, 7,863.69 and 4,920.72 is: 6,764.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,720.33 : 7,863.69 = 4,920.72 : x
  2. Step 2: Convert to fraction form
    5,720.33/7,863.69 = 4,920.72/x
  3. Step 3: Cross multiply
    5,720.33x = 7,863.69 × 4,920.72
  4. Step 4: Simplify right side
    5,720.33x = 38,695,016.66
  5. Step 5: Solve for x
    x = 38,695,016.66/5,720.33
  6. Step 6: Final answer
    x = 6,764.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.