Home / 12,221.25-18,331.88-4,430.07

Finding the Fourth Proportional to 12,221.25, 18,331.88 and 4,430.07

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Solution

The fourth proportional to 12,221.25, 18,331.88 and 4,430.07 is: 6,645.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.25 : 18,331.88 = 4,430.07 : x
  2. Step 2: Convert to fraction form
    12,221.25/18,331.88 = 4,430.07/x
  3. Step 3: Cross multiply
    12,221.25x = 18,331.88 × 4,430.07
  4. Step 4: Simplify right side
    12,221.25x = 81,211,489.48
  5. Step 5: Solve for x
    x = 81,211,489.48/12,221.25
  6. Step 6: Final answer
    x = 6,645.11

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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.