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Finding the Fourth Proportional to 13,213,195.20, 19,819,792.80 and 13,213,195.20

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Solution

The fourth proportional to 13,213,195.20, 19,819,792.80 and 13,213,195.20 is: 19,819,792.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213,195.20 : 19,819,792.80 = 13,213,195.20 : x
  2. Step 2: Convert to fraction form
    13,213,195.20/19,819,792.80 = 13,213,195.20/x
  3. Step 3: Cross multiply
    13,213,195.20x = 19,819,792.80 × 13,213,195.20
  4. Step 4: Simplify right side
    13,213,195.20x = 261,882,791,089,954.56
  5. Step 5: Solve for x
    x = 261,882,791,089,954.56/13,213,195.20
  6. Step 6: Final answer
    x = 19,819,792.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.