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Finding the Fourth Proportional to 8,279.54, 12,428.15 and 3,352.40

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Solution

The fourth proportional to 8,279.54, 12,428.15 and 3,352.40 is: 5,032.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.54 : 12,428.15 = 3,352.40 : x
  2. Step 2: Convert to fraction form
    8,279.54/12,428.15 = 3,352.40/x
  3. Step 3: Cross multiply
    8,279.54x = 12,428.15 × 3,352.40
  4. Step 4: Simplify right side
    8,279.54x = 41,664,130.06
  5. Step 5: Solve for x
    x = 41,664,130.06/8,279.54
  6. Step 6: Final answer
    x = 5,032.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.