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Finding the Fourth Proportional to 20,728.60, 29,049.20 and 20,728.60

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Solution

The fourth proportional to 20,728.60, 29,049.20 and 20,728.60 is: 29,049.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.60 : 29,049.20 = 20,728.60 : x
  2. Step 2: Convert to fraction form
    20,728.60/29,049.20 = 20,728.60/x
  3. Step 3: Cross multiply
    20,728.60x = 29,049.20 × 20,728.60
  4. Step 4: Simplify right side
    20,728.60x = 602,149,247.12
  5. Step 5: Solve for x
    x = 602,149,247.12/20,728.60
  6. Step 6: Final answer
    x = 29,049.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.