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Finding the Fourth Proportional to 12,172.79, 16,793.11 and 7,134.46

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Solution

The fourth proportional to 12,172.79, 16,793.11 and 7,134.46 is: 9,842.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.79 : 16,793.11 = 7,134.46 : x
  2. Step 2: Convert to fraction form
    12,172.79/16,793.11 = 7,134.46/x
  3. Step 3: Cross multiply
    12,172.79x = 16,793.11 × 7,134.46
  4. Step 4: Simplify right side
    12,172.79x = 119,809,771.57
  5. Step 5: Solve for x
    x = 119,809,771.57/12,172.79
  6. Step 6: Final answer
    x = 9,842.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.