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Finding the Fourth Proportional to 12,228.76, 18,353.94 and 6,687.16

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Solution

The fourth proportional to 12,228.76, 18,353.94 and 6,687.16 is: 10,036.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,228.76 : 18,353.94 = 6,687.16 : x
  2. Step 2: Convert to fraction form
    12,228.76/18,353.94 = 6,687.16/x
  3. Step 3: Cross multiply
    12,228.76x = 18,353.94 × 6,687.16
  4. Step 4: Simplify right side
    12,228.76x = 122,735,733.41
  5. Step 5: Solve for x
    x = 122,735,733.41/12,228.76
  6. Step 6: Final answer
    x = 10,036.65

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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.