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Finding the Fourth Proportional to 7,076.75, 9,765.68 and 3,890.06

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Solution

The fourth proportional to 7,076.75, 9,765.68 and 3,890.06 is: 5,368.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,076.75 : 9,765.68 = 3,890.06 : x
  2. Step 2: Convert to fraction form
    7,076.75/9,765.68 = 3,890.06/x
  3. Step 3: Cross multiply
    7,076.75x = 9,765.68 × 3,890.06
  4. Step 4: Simplify right side
    7,076.75x = 37,989,012.86
  5. Step 5: Solve for x
    x = 37,989,012.86/7,076.75
  6. Step 6: Final answer
    x = 5,368.15

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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.