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Finding the Fourth Proportional to 8,000.72, 11,028.36 and 5,639.12

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Solution

The fourth proportional to 8,000.72, 11,028.36 and 5,639.12 is: 7,773.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,000.72 : 11,028.36 = 5,639.12 : x
  2. Step 2: Convert to fraction form
    8,000.72/11,028.36 = 5,639.12/x
  3. Step 3: Cross multiply
    8,000.72x = 11,028.36 × 5,639.12
  4. Step 4: Simplify right side
    8,000.72x = 62,190,245.44
  5. Step 5: Solve for x
    x = 62,190,245.44/8,000.72
  6. Step 6: Final answer
    x = 7,773.08

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.