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Finding the Fourth Proportional to 12,103.98, 18,145.03 and 8,407.95

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Solution

The fourth proportional to 12,103.98, 18,145.03 and 8,407.95 is: 12,604.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,103.98 : 18,145.03 = 8,407.95 : x
  2. Step 2: Convert to fraction form
    12,103.98/18,145.03 = 8,407.95/x
  3. Step 3: Cross multiply
    12,103.98x = 18,145.03 × 8,407.95
  4. Step 4: Simplify right side
    12,103.98x = 152,562,504.99
  5. Step 5: Solve for x
    x = 152,562,504.99/12,103.98
  6. Step 6: Final answer
    x = 12,604.33

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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.