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Finding the Fourth Proportional to 7,951.90, 11,927.96 and 2,405.28

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Solution

The fourth proportional to 7,951.90, 11,927.96 and 2,405.28 is: 3,607.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,951.90 : 11,927.96 = 2,405.28 : x
  2. Step 2: Convert to fraction form
    7,951.90/11,927.96 = 2,405.28/x
  3. Step 3: Cross multiply
    7,951.90x = 11,927.96 × 2,405.28
  4. Step 4: Simplify right side
    7,951.90x = 28,690,083.63
  5. Step 5: Solve for x
    x = 28,690,083.63/7,951.90
  6. Step 6: Final answer
    x = 3,607.95

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1.5x scale

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.