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Finding the Fourth Proportional to 18,261.36, 27,392.04 and 8,407.80

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Solution

The fourth proportional to 18,261.36, 27,392.04 and 8,407.80 is: 12,611.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,261.36 : 27,392.04 = 8,407.80 : x
  2. Step 2: Convert to fraction form
    18,261.36/27,392.04 = 8,407.80/x
  3. Step 3: Cross multiply
    18,261.36x = 27,392.04 × 8,407.80
  4. Step 4: Simplify right side
    18,261.36x = 230,306,793.91
  5. Step 5: Solve for x
    x = 230,306,793.91/18,261.36
  6. Step 6: Final answer
    x = 12,611.70

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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.