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Finding the Fourth Proportional to 18,393.71, 25,388.67 and 12,021.23

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Solution

The fourth proportional to 18,393.71, 25,388.67 and 12,021.23 is: 16,592.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,393.71 : 25,388.67 = 12,021.23 : x
  2. Step 2: Convert to fraction form
    18,393.71/25,388.67 = 12,021.23/x
  3. Step 3: Cross multiply
    18,393.71x = 25,388.67 × 12,021.23
  4. Step 4: Simplify right side
    18,393.71x = 305,202,914.52
  5. Step 5: Solve for x
    x = 305,202,914.52/18,393.71
  6. Step 6: Final answer
    x = 16,592.79

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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.