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Finding the Fourth Proportional to 20,502.10, 30,728.24 and 11,119.87

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Solution

The fourth proportional to 20,502.10, 30,728.24 and 11,119.87 is: 16,666.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,502.10 : 30,728.24 = 11,119.87 : x
  2. Step 2: Convert to fraction form
    20,502.10/30,728.24 = 11,119.87/x
  3. Step 3: Cross multiply
    20,502.10x = 30,728.24 × 11,119.87
  4. Step 4: Simplify right side
    20,502.10x = 341,693,824.89
  5. Step 5: Solve for x
    x = 341,693,824.89/20,502.10
  6. Step 6: Final answer
    x = 16,666.29

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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.