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Finding the Fourth Proportional to 12,561.66, 18,826.56 and 12,234.60

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Solution

The fourth proportional to 12,561.66, 18,826.56 and 12,234.60 is: 18,336.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,561.66 : 18,826.56 = 12,234.60 : x
  2. Step 2: Convert to fraction form
    12,561.66/18,826.56 = 12,234.60/x
  3. Step 3: Cross multiply
    12,561.66x = 18,826.56 × 12,234.60
  4. Step 4: Simplify right side
    12,561.66x = 230,335,430.98
  5. Step 5: Solve for x
    x = 230,335,430.98/12,561.66
  6. Step 6: Final answer
    x = 18,336.38

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1.5x scale

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.