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Finding the Fourth Proportional to 8,840.85, 12,209.88 and 5,491.62

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Solution

The fourth proportional to 8,840.85, 12,209.88 and 5,491.62 is: 7,584.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,840.85 : 12,209.88 = 5,491.62 : x
  2. Step 2: Convert to fraction form
    8,840.85/12,209.88 = 5,491.62/x
  3. Step 3: Cross multiply
    8,840.85x = 12,209.88 × 5,491.62
  4. Step 4: Simplify right side
    8,840.85x = 67,052,021.21
  5. Step 5: Solve for x
    x = 67,052,021.21/8,840.85
  6. Step 6: Final answer
    x = 7,584.34

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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.