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Finding the Fourth Proportional to 11,207.70, 16,811.55 and 9,020.70

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Solution

The fourth proportional to 11,207.70, 16,811.55 and 9,020.70 is: 13,531.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,207.70 : 16,811.55 = 9,020.70 : x
  2. Step 2: Convert to fraction form
    11,207.70/16,811.55 = 9,020.70/x
  3. Step 3: Cross multiply
    11,207.70x = 16,811.55 × 9,020.70
  4. Step 4: Simplify right side
    11,207.70x = 151,651,949.09
  5. Step 5: Solve for x
    x = 151,651,949.09/11,207.70
  6. Step 6: Final answer
    x = 13,531.05

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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.