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Finding the Fourth Proportional to 8,230.60, 12,345.90 and 5,606.20

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Solution

The fourth proportional to 8,230.60, 12,345.90 and 5,606.20 is: 8,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,230.60 : 12,345.90 = 5,606.20 : x
  2. Step 2: Convert to fraction form
    8,230.60/12,345.90 = 5,606.20/x
  3. Step 3: Cross multiply
    8,230.60x = 12,345.90 × 5,606.20
  4. Step 4: Simplify right side
    8,230.60x = 69,213,584.58
  5. Step 5: Solve for x
    x = 69,213,584.58/8,230.60
  6. Step 6: Final answer
    x = 8,409.30

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