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Finding the Fourth Proportional to 6,891, 10,323.39 and 3,931.50

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Solution

The fourth proportional to 6,891, 10,323.39 and 3,931.50 is: 5,889.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,891 : 10,323.39 = 3,931.50 : x
  2. Step 2: Convert to fraction form
    6,891/10,323.39 = 3,931.50/x
  3. Step 3: Cross multiply
    6,891x = 10,323.39 × 3,931.50
  4. Step 4: Simplify right side
    6,891x = 40,586,407.79
  5. Step 5: Solve for x
    x = 40,586,407.79/6,891
  6. Step 6: Final answer
    x = 5,889.77

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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.