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Finding the Fourth Proportional to 11,208.79, 16,813.17 and 3,311.40

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Solution

The fourth proportional to 11,208.79, 16,813.17 and 3,311.40 is: 4,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,208.79 : 16,813.17 = 3,311.40 : x
  2. Step 2: Convert to fraction form
    11,208.79/16,813.17 = 3,311.40/x
  3. Step 3: Cross multiply
    11,208.79x = 16,813.17 × 3,311.40
  4. Step 4: Simplify right side
    11,208.79x = 55,675,131.14
  5. Step 5: Solve for x
    x = 55,675,131.14/11,208.79
  6. Step 6: Final answer
    x = 4,967.10

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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.