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Finding the Fourth Proportional to 8,001.20, 11,213.20 and 8,001.20

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Solution

The fourth proportional to 8,001.20, 11,213.20 and 8,001.20 is: 11,213.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,001.20 : 11,213.20 = 8,001.20 : x
  2. Step 2: Convert to fraction form
    8,001.20/11,213.20 = 8,001.20/x
  3. Step 3: Cross multiply
    8,001.20x = 11,213.20 × 8,001.20
  4. Step 4: Simplify right side
    8,001.20x = 89,719,055.84
  5. Step 5: Solve for x
    x = 89,719,055.84/8,001.20
  6. Step 6: Final answer
    x = 11,213.20

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Half scale
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Double scale
Find fourth proportional to 8,002.20, 11,214.60 and 8,002.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.