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Finding the Fourth Proportional to 11,893.50, 17,929.69 and 11,090.79

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Solution

The fourth proportional to 11,893.50, 17,929.69 and 11,090.79 is: 16,719.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,893.50 : 17,929.69 = 11,090.79 : x
  2. Step 2: Convert to fraction form
    11,893.50/17,929.69 = 11,090.79/x
  3. Step 3: Cross multiply
    11,893.50x = 17,929.69 × 11,090.79
  4. Step 4: Simplify right side
    11,893.50x = 198,854,398.83
  5. Step 5: Solve for x
    x = 198,854,398.83/11,893.50
  6. Step 6: Final answer
    x = 16,719.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.