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Finding the Fourth Proportional to 5,912.40, 8,881.80 and 4,940.40

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Solution

The fourth proportional to 5,912.40, 8,881.80 and 4,940.40 is: 7,421.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,912.40 : 8,881.80 = 4,940.40 : x
  2. Step 2: Convert to fraction form
    5,912.40/8,881.80 = 4,940.40/x
  3. Step 3: Cross multiply
    5,912.40x = 8,881.80 × 4,940.40
  4. Step 4: Simplify right side
    5,912.40x = 43,879,644.72
  5. Step 5: Solve for x
    x = 43,879,644.72/5,912.40
  6. Step 6: Final answer
    x = 7,421.63

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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.