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Finding the Fourth Proportional to 7,894.81, 11,840.39 and 3,509.88

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Solution

The fourth proportional to 7,894.81, 11,840.39 and 3,509.88 is: 5,264.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,894.81 : 11,840.39 = 3,509.88 : x
  2. Step 2: Convert to fraction form
    7,894.81/11,840.39 = 3,509.88/x
  3. Step 3: Cross multiply
    7,894.81x = 11,840.39 × 3,509.88
  4. Step 4: Simplify right side
    7,894.81x = 41,558,348.05
  5. Step 5: Solve for x
    x = 41,558,348.05/7,894.81
  6. Step 6: Final answer
    x = 5,264.01

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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.