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Finding the Fourth Proportional to 20,400.80, 30,601.20 and 19,623.20

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Solution

The fourth proportional to 20,400.80, 30,601.20 and 19,623.20 is: 29,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.80 : 30,601.20 = 19,623.20 : x
  2. Step 2: Convert to fraction form
    20,400.80/30,601.20 = 19,623.20/x
  3. Step 3: Cross multiply
    20,400.80x = 30,601.20 × 19,623.20
  4. Step 4: Simplify right side
    20,400.80x = 600,493,467.84
  5. Step 5: Solve for x
    x = 600,493,467.84/20,400.80
  6. Step 6: Final answer
    x = 29,434.80

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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.