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Finding the Fourth Proportional to 11,118.80, 16,694.40 and 8,656.40

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Solution

The fourth proportional to 11,118.80, 16,694.40 and 8,656.40 is: 12,997.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,118.80 : 16,694.40 = 8,656.40 : x
  2. Step 2: Convert to fraction form
    11,118.80/16,694.40 = 8,656.40/x
  3. Step 3: Cross multiply
    11,118.80x = 16,694.40 × 8,656.40
  4. Step 4: Simplify right side
    11,118.80x = 144,513,404.16
  5. Step 5: Solve for x
    x = 144,513,404.16/11,118.80
  6. Step 6: Final answer
    x = 12,997.21

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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.