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Finding the Fourth Proportional to 11,213.67, 16,811.31 and 5,287.71

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Solution

The fourth proportional to 11,213.67, 16,811.31 and 5,287.71 is: 7,927.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,213.67 : 16,811.31 = 5,287.71 : x
  2. Step 2: Convert to fraction form
    11,213.67/16,811.31 = 5,287.71/x
  3. Step 3: Cross multiply
    11,213.67x = 16,811.31 × 5,287.71
  4. Step 4: Simplify right side
    11,213.67x = 88,893,332.00
  5. Step 5: Solve for x
    x = 88,893,332.00/11,213.67
  6. Step 6: Final answer
    x = 7,927.23

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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.