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Finding the Fourth Proportional to 12,480.80, 18,666.12 and 11,103.80

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Solution

The fourth proportional to 12,480.80, 18,666.12 and 11,103.80 is: 16,606.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.80 : 18,666.12 = 11,103.80 : x
  2. Step 2: Convert to fraction form
    12,480.80/18,666.12 = 11,103.80/x
  3. Step 3: Cross multiply
    12,480.80x = 18,666.12 × 11,103.80
  4. Step 4: Simplify right side
    12,480.80x = 207,264,863.26
  5. Step 5: Solve for x
    x = 207,264,863.26/12,480.80
  6. Step 6: Final answer
    x = 16,606.70

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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.