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Finding the Fourth Proportional to 38,910, 58,374.72 and 11,208

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Solution

The fourth proportional to 38,910, 58,374.72 and 11,208 is: 16,814.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,910 : 58,374.72 = 11,208 : x
  2. Step 2: Convert to fraction form
    38,910/58,374.72 = 11,208/x
  3. Step 3: Cross multiply
    38,910x = 58,374.72 × 11,208
  4. Step 4: Simplify right side
    38,910x = 654,263,861.76
  5. Step 5: Solve for x
    x = 654,263,861.76/38,910
  6. Step 6: Final answer
    x = 16,814.80

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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.