Home / 22,109.40-33,164.10-12,778.20

Finding the Fourth Proportional to 22,109.40, 33,164.10 and 12,778.20

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Solution

The fourth proportional to 22,109.40, 33,164.10 and 12,778.20 is: 19,167.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,109.40 : 33,164.10 = 12,778.20 : x
  2. Step 2: Convert to fraction form
    22,109.40/33,164.10 = 12,778.20/x
  3. Step 3: Cross multiply
    22,109.40x = 33,164.10 × 12,778.20
  4. Step 4: Simplify right side
    22,109.40x = 423,777,502.62
  5. Step 5: Solve for x
    x = 423,777,502.62/22,109.40
  6. Step 6: Final answer
    x = 19,167.30

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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.