Home / 21,100.64-31,623.01-11,218.64

Finding the Fourth Proportional to 21,100.64, 31,623.01 and 11,218.64

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Solution

The fourth proportional to 21,100.64, 31,623.01 and 11,218.64 is: 16,813.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.64 : 31,623.01 = 11,218.64 : x
  2. Step 2: Convert to fraction form
    21,100.64/31,623.01 = 11,218.64/x
  3. Step 3: Cross multiply
    21,100.64x = 31,623.01 × 11,218.64
  4. Step 4: Simplify right side
    21,100.64x = 354,766,978.74
  5. Step 5: Solve for x
    x = 354,766,978.74/21,100.64
  6. Step 6: Final answer
    x = 16,813.09

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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.