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Finding the Fourth Proportional to 6,378.90, 9,574.43 and 3,918.53

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Solution

The fourth proportional to 6,378.90, 9,574.43 and 3,918.53 is: 5,881.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,378.90 : 9,574.43 = 3,918.53 : x
  2. Step 2: Convert to fraction form
    6,378.90/9,574.43 = 3,918.53/x
  3. Step 3: Cross multiply
    6,378.90x = 9,574.43 × 3,918.53
  4. Step 4: Simplify right side
    6,378.90x = 37,517,623.72
  5. Step 5: Solve for x
    x = 37,517,623.72/6,378.90
  6. Step 6: Final answer
    x = 5,881.52

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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.