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Finding the Fourth Proportional to 30,221.76, 45,358.56 and 12,465.84

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Solution

The fourth proportional to 30,221.76, 45,358.56 and 12,465.84 is: 18,709.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,221.76 : 45,358.56 = 12,465.84 : x
  2. Step 2: Convert to fraction form
    30,221.76/45,358.56 = 12,465.84/x
  3. Step 3: Cross multiply
    30,221.76x = 45,358.56 × 12,465.84
  4. Step 4: Simplify right side
    30,221.76x = 565,432,551.59
  5. Step 5: Solve for x
    x = 565,432,551.59/30,221.76
  6. Step 6: Final answer
    x = 18,709.45

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