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Finding the Fourth Proportional to 22,379.94, 30,885.09 and 12,309.14

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Solution

The fourth proportional to 22,379.94, 30,885.09 and 12,309.14 is: 16,987.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,379.94 : 30,885.09 = 12,309.14 : x
  2. Step 2: Convert to fraction form
    22,379.94/30,885.09 = 12,309.14/x
  3. Step 3: Cross multiply
    22,379.94x = 30,885.09 × 12,309.14
  4. Step 4: Simplify right side
    22,379.94x = 380,168,896.72
  5. Step 5: Solve for x
    x = 380,168,896.72/22,379.94
  6. Step 6: Final answer
    x = 16,987.04

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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.