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Finding the Fourth Proportional to 7,870.64, 11,798.94 and 2,936.48

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Solution

The fourth proportional to 7,870.64, 11,798.94 and 2,936.48 is: 4,402.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,870.64 : 11,798.94 = 2,936.48 : x
  2. Step 2: Convert to fraction form
    7,870.64/11,798.94 = 2,936.48/x
  3. Step 3: Cross multiply
    7,870.64x = 11,798.94 × 2,936.48
  4. Step 4: Simplify right side
    7,870.64x = 34,647,351.33
  5. Step 5: Solve for x
    x = 34,647,351.33/7,870.64
  6. Step 6: Final answer
    x = 4,402.10

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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.