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Finding the Fourth Proportional to 18,913.30, 28,418.36 and 14,276.97

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Solution

The fourth proportional to 18,913.30, 28,418.36 and 14,276.97 is: 21,452.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.30 : 28,418.36 = 14,276.97 : x
  2. Step 2: Convert to fraction form
    18,913.30/28,418.36 = 14,276.97/x
  3. Step 3: Cross multiply
    18,913.30x = 28,418.36 × 14,276.97
  4. Step 4: Simplify right side
    18,913.30x = 405,728,001.78
  5. Step 5: Solve for x
    x = 405,728,001.78/18,913.30
  6. Step 6: Final answer
    x = 21,452.00

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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.