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Finding the Fourth Proportional to 12,190.56, 16,806.24 and 7,712.10

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Solution

The fourth proportional to 12,190.56, 16,806.24 and 7,712.10 is: 10,632.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.56 : 16,806.24 = 7,712.10 : x
  2. Step 2: Convert to fraction form
    12,190.56/16,806.24 = 7,712.10/x
  3. Step 3: Cross multiply
    12,190.56x = 16,806.24 × 7,712.10
  4. Step 4: Simplify right side
    12,190.56x = 129,611,403.50
  5. Step 5: Solve for x
    x = 129,611,403.50/12,190.56
  6. Step 6: Final answer
    x = 10,632.11

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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.