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Finding the Fourth Proportional to 11,116.80, 16,675.20 and 8,200.80

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Solution

The fourth proportional to 11,116.80, 16,675.20 and 8,200.80 is: 12,301.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,116.80 : 16,675.20 = 8,200.80 : x
  2. Step 2: Convert to fraction form
    11,116.80/16,675.20 = 8,200.80/x
  3. Step 3: Cross multiply
    11,116.80x = 16,675.20 × 8,200.80
  4. Step 4: Simplify right side
    11,116.80x = 136,749,980.16
  5. Step 5: Solve for x
    x = 136,749,980.16/11,116.80
  6. Step 6: Final answer
    x = 12,301.20

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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.