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Finding the Fourth Proportional to 12,261.20, 16,920.88 and 6,955.84

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Solution

The fourth proportional to 12,261.20, 16,920.88 and 6,955.84 is: 9,599.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,261.20 : 16,920.88 = 6,955.84 : x
  2. Step 2: Convert to fraction form
    12,261.20/16,920.88 = 6,955.84/x
  3. Step 3: Cross multiply
    12,261.20x = 16,920.88 × 6,955.84
  4. Step 4: Simplify right side
    12,261.20x = 117,698,933.94
  5. Step 5: Solve for x
    x = 117,698,933.94/12,261.20
  6. Step 6: Final answer
    x = 9,599.30

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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.