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Finding the Fourth Proportional to 12,999.28, 17,928.88 and 11,940.32

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Solution

The fourth proportional to 12,999.28, 17,928.88 and 11,940.32 is: 16,468.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.28 : 17,928.88 = 11,940.32 : x
  2. Step 2: Convert to fraction form
    12,999.28/17,928.88 = 11,940.32/x
  3. Step 3: Cross multiply
    12,999.28x = 17,928.88 × 11,940.32
  4. Step 4: Simplify right side
    12,999.28x = 214,076,564.44
  5. Step 5: Solve for x
    x = 214,076,564.44/12,999.28
  6. Step 6: Final answer
    x = 16,468.34

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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.