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Finding the Fourth Proportional to 27,978, 38,609.76 and 15,402.48

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Solution

The fourth proportional to 27,978, 38,609.76 and 15,402.48 is: 21,255.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,978 : 38,609.76 = 15,402.48 : x
  2. Step 2: Convert to fraction form
    27,978/38,609.76 = 15,402.48/x
  3. Step 3: Cross multiply
    27,978x = 38,609.76 × 15,402.48
  4. Step 4: Simplify right side
    27,978x = 594,686,056.20
  5. Step 5: Solve for x
    x = 594,686,056.20/27,978
  6. Step 6: Final answer
    x = 21,255.49

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