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Finding the Fourth Proportional to 13,446.20, 20,172.02 and 5,655

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Solution

The fourth proportional to 13,446.20, 20,172.02 and 5,655 is: 8,483.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,446.20 : 20,172.02 = 5,655 : x
  2. Step 2: Convert to fraction form
    13,446.20/20,172.02 = 5,655/x
  3. Step 3: Cross multiply
    13,446.20x = 20,172.02 × 5,655
  4. Step 4: Simplify right side
    13,446.20x = 114,072,744.83
  5. Step 5: Solve for x
    x = 114,072,744.83/13,446.20
  6. Step 6: Final answer
    x = 8,483.64

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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.