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Finding the Fourth Proportional to 8,130.25, 11,219.79 and 4,404.25

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Solution

The fourth proportional to 8,130.25, 11,219.79 and 4,404.25 is: 6,077.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.25 : 11,219.79 = 4,404.25 : x
  2. Step 2: Convert to fraction form
    8,130.25/11,219.79 = 4,404.25/x
  3. Step 3: Cross multiply
    8,130.25x = 11,219.79 × 4,404.25
  4. Step 4: Simplify right side
    8,130.25x = 49,414,760.11
  5. Step 5: Solve for x
    x = 49,414,760.11/8,130.25
  6. Step 6: Final answer
    x = 6,077.89

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.