Home / 8,072.80-12,109.20-5,317.04

Finding the Fourth Proportional to 8,072.80, 12,109.20 and 5,317.04

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Solution

The fourth proportional to 8,072.80, 12,109.20 and 5,317.04 is: 7,975.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,072.80 : 12,109.20 = 5,317.04 : x
  2. Step 2: Convert to fraction form
    8,072.80/12,109.20 = 5,317.04/x
  3. Step 3: Cross multiply
    8,072.80x = 12,109.20 × 5,317.04
  4. Step 4: Simplify right side
    8,072.80x = 64,385,100.77
  5. Step 5: Solve for x
    x = 64,385,100.77/8,072.80
  6. Step 6: Final answer
    x = 7,975.56

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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.