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Finding the Fourth Proportional to 20,473.96, 30,728.22 and 14,145.16

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Solution

The fourth proportional to 20,473.96, 30,728.22 and 14,145.16 is: 21,229.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,473.96 : 30,728.22 = 14,145.16 : x
  2. Step 2: Convert to fraction form
    20,473.96/30,728.22 = 14,145.16/x
  3. Step 3: Cross multiply
    20,473.96x = 30,728.22 × 14,145.16
  4. Step 4: Simplify right side
    20,473.96x = 434,655,588.42
  5. Step 5: Solve for x
    x = 434,655,588.42/20,473.96
  6. Step 6: Final answer
    x = 21,229.68

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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.