Home / 5,121.72-7,680.96-4,305.24

Finding the Fourth Proportional to 5,121.72, 7,680.96 and 4,305.24

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Solution

The fourth proportional to 5,121.72, 7,680.96 and 4,305.24 is: 6,456.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.72 : 7,680.96 = 4,305.24 : x
  2. Step 2: Convert to fraction form
    5,121.72/7,680.96 = 4,305.24/x
  3. Step 3: Cross multiply
    5,121.72x = 7,680.96 × 4,305.24
  4. Step 4: Simplify right side
    5,121.72x = 33,068,376.23
  5. Step 5: Solve for x
    x = 33,068,376.23/5,121.72
  6. Step 6: Final answer
    x = 6,456.50

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Double scale
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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.