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Finding the Fourth Proportional to 18,771.30, 25,912.17 and 12,057.30

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Solution

The fourth proportional to 18,771.30, 25,912.17 and 12,057.30 is: 16,644.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771.30 : 25,912.17 = 12,057.30 : x
  2. Step 2: Convert to fraction form
    18,771.30/25,912.17 = 12,057.30/x
  3. Step 3: Cross multiply
    18,771.30x = 25,912.17 × 12,057.30
  4. Step 4: Simplify right side
    18,771.30x = 312,430,807.34
  5. Step 5: Solve for x
    x = 312,430,807.34/18,771.30
  6. Step 6: Final answer
    x = 16,644.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.