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Finding the Fourth Proportional to 12,328.80, 18,493.20 and 11,205.60

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Solution

The fourth proportional to 12,328.80, 18,493.20 and 11,205.60 is: 16,808.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,328.80 : 18,493.20 = 11,205.60 : x
  2. Step 2: Convert to fraction form
    12,328.80/18,493.20 = 11,205.60/x
  3. Step 3: Cross multiply
    12,328.80x = 18,493.20 × 11,205.60
  4. Step 4: Simplify right side
    12,328.80x = 207,227,401.92
  5. Step 5: Solve for x
    x = 207,227,401.92/12,328.80
  6. Step 6: Final answer
    x = 16,808.40

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Similar ratio
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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.