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Finding the Fourth Proportional to 13,421, 20,134.38 and 5,213

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Solution

The fourth proportional to 13,421, 20,134.38 and 5,213 is: 7,820.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421 : 20,134.38 = 5,213 : x
  2. Step 2: Convert to fraction form
    13,421/20,134.38 = 5,213/x
  3. Step 3: Cross multiply
    13,421x = 20,134.38 × 5,213
  4. Step 4: Simplify right side
    13,421x = 104,960,522.94
  5. Step 5: Solve for x
    x = 104,960,522.94/13,421
  6. Step 6: Final answer
    x = 7,820.62

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