Home / 5,418.40-8,121.20-4,048.80

Finding the Fourth Proportional to 5,418.40, 8,121.20 and 4,048.80

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Solution

The fourth proportional to 5,418.40, 8,121.20 and 4,048.80 is: 6,068.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.40 : 8,121.20 = 4,048.80 : x
  2. Step 2: Convert to fraction form
    5,418.40/8,121.20 = 4,048.80/x
  3. Step 3: Cross multiply
    5,418.40x = 8,121.20 × 4,048.80
  4. Step 4: Simplify right side
    5,418.40x = 32,881,114.56
  5. Step 5: Solve for x
    x = 32,881,114.56/5,418.40
  6. Step 6: Final answer
    x = 6,068.42

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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.