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Finding the Fourth Proportional to 20,404, 30,611.40 and 6,553.36

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Solution

The fourth proportional to 20,404, 30,611.40 and 6,553.36 is: 9,831.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404 : 30,611.40 = 6,553.36 : x
  2. Step 2: Convert to fraction form
    20,404/30,611.40 = 6,553.36/x
  3. Step 3: Cross multiply
    20,404x = 30,611.40 × 6,553.36
  4. Step 4: Simplify right side
    20,404x = 200,607,524.30
  5. Step 5: Solve for x
    x = 200,607,524.30/20,404
  6. Step 6: Final answer
    x = 9,831.77

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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.