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Finding the Fourth Proportional to 12,261.28, 16,920.64 and 6,672.32

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Solution

The fourth proportional to 12,261.28, 16,920.64 and 6,672.32 is: 9,207.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.28 : 16,920.64 = 6,672.32 : x
  2. Step 2: Convert to fraction form
    12,261.28/16,920.64 = 6,672.32/x
  3. Step 3: Cross multiply
    12,261.28x = 16,920.64 × 6,672.32
  4. Step 4: Simplify right side
    12,261.28x = 112,899,924.68
  5. Step 5: Solve for x
    x = 112,899,924.68/12,261.28
  6. Step 6: Final answer
    x = 9,207.84

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.