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Finding the Fourth Proportional to 21,866.92, 30,173.64 and 12,305.64

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Solution

The fourth proportional to 21,866.92, 30,173.64 and 12,305.64 is: 16,980.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,866.92 : 30,173.64 = 12,305.64 : x
  2. Step 2: Convert to fraction form
    21,866.92/30,173.64 = 12,305.64/x
  3. Step 3: Cross multiply
    21,866.92x = 30,173.64 × 12,305.64
  4. Step 4: Simplify right side
    21,866.92x = 371,305,951.33
  5. Step 5: Solve for x
    x = 371,305,951.33/21,866.92
  6. Step 6: Final answer
    x = 16,980.26

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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.