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Finding the Fourth Proportional to 7,039.66, 9,714.63 and 3,895.78

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Solution

The fourth proportional to 7,039.66, 9,714.63 and 3,895.78 is: 5,376.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,039.66 : 9,714.63 = 3,895.78 : x
  2. Step 2: Convert to fraction form
    7,039.66/9,714.63 = 3,895.78/x
  3. Step 3: Cross multiply
    7,039.66x = 9,714.63 × 3,895.78
  4. Step 4: Simplify right side
    7,039.66x = 37,846,061.26
  5. Step 5: Solve for x
    x = 37,846,061.26/7,039.66
  6. Step 6: Final answer
    x = 5,376.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.