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Finding the Fourth Proportional to 6,870, 9,480.60 and 3,885.77

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Solution

The fourth proportional to 6,870, 9,480.60 and 3,885.77 is: 5,362.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,870 : 9,480.60 = 3,885.77 : x
  2. Step 2: Convert to fraction form
    6,870/9,480.60 = 3,885.77/x
  3. Step 3: Cross multiply
    6,870x = 9,480.60 × 3,885.77
  4. Step 4: Simplify right side
    6,870x = 36,839,435.92
  5. Step 5: Solve for x
    x = 36,839,435.92/6,870
  6. Step 6: Final answer
    x = 5,362.36

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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.