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Finding the Fourth Proportional to 18,699.74, 27,999.92 and 11,294.18

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Solution

The fourth proportional to 18,699.74, 27,999.92 and 11,294.18 is: 16,911.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.74 : 27,999.92 = 11,294.18 : x
  2. Step 2: Convert to fraction form
    18,699.74/27,999.92 = 11,294.18/x
  3. Step 3: Cross multiply
    18,699.74x = 27,999.92 × 11,294.18
  4. Step 4: Simplify right side
    18,699.74x = 316,236,136.47
  5. Step 5: Solve for x
    x = 316,236,136.47/18,699.74
  6. Step 6: Final answer
    x = 16,911.26

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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.