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Finding the Fourth Proportional to 8,985.84, 13,478.92 and 3,142.45

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Solution

The fourth proportional to 8,985.84, 13,478.92 and 3,142.45 is: 4,713.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.84 : 13,478.92 = 3,142.45 : x
  2. Step 2: Convert to fraction form
    8,985.84/13,478.92 = 3,142.45/x
  3. Step 3: Cross multiply
    8,985.84x = 13,478.92 × 3,142.45
  4. Step 4: Simplify right side
    8,985.84x = 42,356,783.00
  5. Step 5: Solve for x
    x = 42,356,783.00/8,985.84
  6. Step 6: Final answer
    x = 4,713.73

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