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Finding the Fourth Proportional to 12,756.92, 17,604.94 and 7,722.06

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Solution

The fourth proportional to 12,756.92, 17,604.94 and 7,722.06 is: 10,656.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,756.92 : 17,604.94 = 7,722.06 : x
  2. Step 2: Convert to fraction form
    12,756.92/17,604.94 = 7,722.06/x
  3. Step 3: Cross multiply
    12,756.92x = 17,604.94 × 7,722.06
  4. Step 4: Simplify right side
    12,756.92x = 135,946,402.98
  5. Step 5: Solve for x
    x = 135,946,402.98/12,756.92
  6. Step 6: Final answer
    x = 10,656.68

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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.