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Finding the Fourth Proportional to 13,553.20, 20,320.20 and 6,161.20

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Solution

The fourth proportional to 13,553.20, 20,320.20 and 6,161.20 is: 9,237.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,553.20 : 20,320.20 = 6,161.20 : x
  2. Step 2: Convert to fraction form
    13,553.20/20,320.20 = 6,161.20/x
  3. Step 3: Cross multiply
    13,553.20x = 20,320.20 × 6,161.20
  4. Step 4: Simplify right side
    13,553.20x = 125,196,816.24
  5. Step 5: Solve for x
    x = 125,196,816.24/13,553.20
  6. Step 6: Final answer
    x = 9,237.44

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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.