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Finding the Fourth Proportional to 15,040, 20,755.20 and 8,416

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Solution

The fourth proportional to 15,040, 20,755.20 and 8,416 is: 11,614.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,040 : 20,755.20 = 8,416 : x
  2. Step 2: Convert to fraction form
    15,040/20,755.20 = 8,416/x
  3. Step 3: Cross multiply
    15,040x = 20,755.20 × 8,416
  4. Step 4: Simplify right side
    15,040x = 174,675,763.20
  5. Step 5: Solve for x
    x = 174,675,763.20/15,040
  6. Step 6: Final answer
    x = 11,614.08

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