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Finding the Fourth Proportional to 18,339.40, 25,311.18 and 11,270.80

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Solution

The fourth proportional to 18,339.40, 25,311.18 and 11,270.80 is: 15,555.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,339.40 : 25,311.18 = 11,270.80 : x
  2. Step 2: Convert to fraction form
    18,339.40/25,311.18 = 11,270.80/x
  3. Step 3: Cross multiply
    18,339.40x = 25,311.18 × 11,270.80
  4. Step 4: Simplify right side
    18,339.40x = 285,277,247.54
  5. Step 5: Solve for x
    x = 285,277,247.54/18,339.40
  6. Step 6: Final answer
    x = 15,555.43

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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.