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Finding the Fourth Proportional to 12,605.18, 18,906.99 and 5,583.15

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Solution

The fourth proportional to 12,605.18, 18,906.99 and 5,583.15 is: 8,374.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,605.18 : 18,906.99 = 5,583.15 : x
  2. Step 2: Convert to fraction form
    12,605.18/18,906.99 = 5,583.15/x
  3. Step 3: Cross multiply
    12,605.18x = 18,906.99 × 5,583.15
  4. Step 4: Simplify right side
    12,605.18x = 105,560,561.22
  5. Step 5: Solve for x
    x = 105,560,561.22/12,605.18
  6. Step 6: Final answer
    x = 8,374.38

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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.