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Finding the Fourth Proportional to 5,815.90, 8,720.20 and 3,043.48

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Solution

The fourth proportional to 5,815.90, 8,720.20 and 3,043.48 is: 4,563.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,815.90 : 8,720.20 = 3,043.48 : x
  2. Step 2: Convert to fraction form
    5,815.90/8,720.20 = 3,043.48/x
  3. Step 3: Cross multiply
    5,815.90x = 8,720.20 × 3,043.48
  4. Step 4: Simplify right side
    5,815.90x = 26,539,754.30
  5. Step 5: Solve for x
    x = 26,539,754.30/5,815.90
  6. Step 6: Final answer
    x = 4,563.31

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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.