Home / 12,135.48-18,203.22-8,230.20

Finding the Fourth Proportional to 12,135.48, 18,203.22 and 8,230.20

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Solution

The fourth proportional to 12,135.48, 18,203.22 and 8,230.20 is: 12,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.48 : 18,203.22 = 8,230.20 : x
  2. Step 2: Convert to fraction form
    12,135.48/18,203.22 = 8,230.20/x
  3. Step 3: Cross multiply
    12,135.48x = 18,203.22 × 8,230.20
  4. Step 4: Simplify right side
    12,135.48x = 149,816,141.24
  5. Step 5: Solve for x
    x = 149,816,141.24/12,135.48
  6. Step 6: Final answer
    x = 12,345.30

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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.