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Finding the Fourth Proportional to 28,206.92, 38,925.48 and 15,631.76

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Solution

The fourth proportional to 28,206.92, 38,925.48 and 15,631.76 is: 21,571.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,206.92 : 38,925.48 = 15,631.76 : x
  2. Step 2: Convert to fraction form
    28,206.92/38,925.48 = 15,631.76/x
  3. Step 3: Cross multiply
    28,206.92x = 38,925.48 × 15,631.76
  4. Step 4: Simplify right side
    28,206.92x = 608,473,761.24
  5. Step 5: Solve for x
    x = 608,473,761.24/28,206.92
  6. Step 6: Final answer
    x = 21,571.79

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