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Finding the Fourth Proportional to 18,803.44, 28,205.10 and 8,407.90

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Solution

The fourth proportional to 18,803.44, 28,205.10 and 8,407.90 is: 12,611.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.44 : 28,205.10 = 8,407.90 : x
  2. Step 2: Convert to fraction form
    18,803.44/28,205.10 = 8,407.90/x
  3. Step 3: Cross multiply
    18,803.44x = 28,205.10 × 8,407.90
  4. Step 4: Simplify right side
    18,803.44x = 237,145,660.29
  5. Step 5: Solve for x
    x = 237,145,660.29/18,803.44
  6. Step 6: Final answer
    x = 12,611.82

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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.