Home / 20,220.90-30,331.44-11,045.22

Finding the Fourth Proportional to 20,220.90, 30,331.44 and 11,045.22

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Solution

The fourth proportional to 20,220.90, 30,331.44 and 11,045.22 is: 16,567.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.90 : 30,331.44 = 11,045.22 : x
  2. Step 2: Convert to fraction form
    20,220.90/30,331.44 = 11,045.22/x
  3. Step 3: Cross multiply
    20,220.90x = 30,331.44 × 11,045.22
  4. Step 4: Simplify right side
    20,220.90x = 335,017,427.72
  5. Step 5: Solve for x
    x = 335,017,427.72/20,220.90
  6. Step 6: Final answer
    x = 16,567.88

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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.