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Finding the Fourth Proportional to 12,478.08, 17,219.20 and 6,888.96

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Solution

The fourth proportional to 12,478.08, 17,219.20 and 6,888.96 is: 9,506.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.08 : 17,219.20 = 6,888.96 : x
  2. Step 2: Convert to fraction form
    12,478.08/17,219.20 = 6,888.96/x
  3. Step 3: Cross multiply
    12,478.08x = 17,219.20 × 6,888.96
  4. Step 4: Simplify right side
    12,478.08x = 118,622,380.03
  5. Step 5: Solve for x
    x = 118,622,380.03/12,478.08
  6. Step 6: Final answer
    x = 9,506.46

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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.