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Finding the Fourth Proportional to 13,648.87, 18,835.35 and 7,680.59

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Solution

The fourth proportional to 13,648.87, 18,835.35 and 7,680.59 is: 10,599.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,648.87 : 18,835.35 = 7,680.59 : x
  2. Step 2: Convert to fraction form
    13,648.87/18,835.35 = 7,680.59/x
  3. Step 3: Cross multiply
    13,648.87x = 18,835.35 × 7,680.59
  4. Step 4: Simplify right side
    13,648.87x = 144,666,600.86
  5. Step 5: Solve for x
    x = 144,666,600.86/13,648.87
  6. Step 6: Final answer
    x = 10,599.16

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