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Finding the Fourth Proportional to 18,728.64, 28,057.08 and 14,024.64

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Solution

The fourth proportional to 18,728.64, 28,057.08 and 14,024.64 is: 21,010.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.64 : 28,057.08 = 14,024.64 : x
  2. Step 2: Convert to fraction form
    18,728.64/28,057.08 = 14,024.64/x
  3. Step 3: Cross multiply
    18,728.64x = 28,057.08 × 14,024.64
  4. Step 4: Simplify right side
    18,728.64x = 393,490,446.45
  5. Step 5: Solve for x
    x = 393,490,446.45/18,728.64
  6. Step 6: Final answer
    x = 21,010.09

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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.