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Finding the Fourth Proportional to 21,818.86, 30,110.03 and 11,882.86

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Solution

The fourth proportional to 21,818.86, 30,110.03 and 11,882.86 is: 16,398.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.86 : 30,110.03 = 11,882.86 : x
  2. Step 2: Convert to fraction form
    21,818.86/30,110.03 = 11,882.86/x
  3. Step 3: Cross multiply
    21,818.86x = 30,110.03 × 11,882.86
  4. Step 4: Simplify right side
    21,818.86x = 357,793,136.40
  5. Step 5: Solve for x
    x = 357,793,136.40/21,818.86
  6. Step 6: Final answer
    x = 16,398.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.