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Finding the Fourth Proportional to 20,573.20, 30,874.20 and 13,195.60

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Solution

The fourth proportional to 20,573.20, 30,874.20 and 13,195.60 is: 19,802.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.20 : 30,874.20 = 13,195.60 : x
  2. Step 2: Convert to fraction form
    20,573.20/30,874.20 = 13,195.60/x
  3. Step 3: Cross multiply
    20,573.20x = 30,874.20 × 13,195.60
  4. Step 4: Simplify right side
    20,573.20x = 407,403,593.52
  5. Step 5: Solve for x
    x = 407,403,593.52/20,573.20
  6. Step 6: Final answer
    x = 19,802.64

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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.