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Finding the Fourth Proportional to 22,169.40, 33,255.70 and 13,385.40

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Solution

The fourth proportional to 22,169.40, 33,255.70 and 13,385.40 is: 20,079.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,169.40 : 33,255.70 = 13,385.40 : x
  2. Step 2: Convert to fraction form
    22,169.40/33,255.70 = 13,385.40/x
  3. Step 3: Cross multiply
    22,169.40x = 33,255.70 × 13,385.40
  4. Step 4: Simplify right side
    22,169.40x = 445,140,846.78
  5. Step 5: Solve for x
    x = 445,140,846.78/22,169.40
  6. Step 6: Final answer
    x = 20,079.07

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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.