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Finding the Fourth Proportional to 27,420.78, 37,840.72 and 14,845.54

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Solution

The fourth proportional to 27,420.78, 37,840.72 and 14,845.54 is: 20,486.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,420.78 : 37,840.72 = 14,845.54 : x
  2. Step 2: Convert to fraction form
    27,420.78/37,840.72 = 14,845.54/x
  3. Step 3: Cross multiply
    27,420.78x = 37,840.72 × 14,845.54
  4. Step 4: Simplify right side
    27,420.78x = 561,765,922.39
  5. Step 5: Solve for x
    x = 561,765,922.39/27,420.78
  6. Step 6: Final answer
    x = 20,486.87

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