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Finding the Fourth Proportional to 7,906.16, 11,865.35 and 2,980.28

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Solution

The fourth proportional to 7,906.16, 11,865.35 and 2,980.28 is: 4,472.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,906.16 : 11,865.35 = 2,980.28 : x
  2. Step 2: Convert to fraction form
    7,906.16/11,865.35 = 2,980.28/x
  3. Step 3: Cross multiply
    7,906.16x = 11,865.35 × 2,980.28
  4. Step 4: Simplify right side
    7,906.16x = 35,362,013.42
  5. Step 5: Solve for x
    x = 35,362,013.42/7,906.16
  6. Step 6: Final answer
    x = 4,472.72

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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.