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Finding the Fourth Proportional to 12,618.09, 18,927.95 and 9,660.78

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Solution

The fourth proportional to 12,618.09, 18,927.95 and 9,660.78 is: 14,491.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.09 : 18,927.95 = 9,660.78 : x
  2. Step 2: Convert to fraction form
    12,618.09/18,927.95 = 9,660.78/x
  3. Step 3: Cross multiply
    12,618.09x = 18,927.95 × 9,660.78
  4. Step 4: Simplify right side
    12,618.09x = 182,858,712.50
  5. Step 5: Solve for x
    x = 182,858,712.50/12,618.09
  6. Step 6: Final answer
    x = 14,491.79

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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.