Home / 22,261.19-30,720.45-12,189.64

Finding the Fourth Proportional to 22,261.19, 30,720.45 and 12,189.64

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Solution

The fourth proportional to 22,261.19, 30,720.45 and 12,189.64 is: 16,821.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,261.19 : 30,720.45 = 12,189.64 : x
  2. Step 2: Convert to fraction form
    22,261.19/30,720.45 = 12,189.64/x
  3. Step 3: Cross multiply
    22,261.19x = 30,720.45 × 12,189.64
  4. Step 4: Simplify right side
    22,261.19x = 374,471,226.14
  5. Step 5: Solve for x
    x = 374,471,226.14/22,261.19
  6. Step 6: Final answer
    x = 16,821.71

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Half scale
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Double scale
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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.