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Finding the Fourth Proportional to 6,479.85, 9,720.36 and 1,800.15

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Solution

The fourth proportional to 6,479.85, 9,720.36 and 1,800.15 is: 2,700.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.85 : 9,720.36 = 1,800.15 : x
  2. Step 2: Convert to fraction form
    6,479.85/9,720.36 = 1,800.15/x
  3. Step 3: Cross multiply
    6,479.85x = 9,720.36 × 1,800.15
  4. Step 4: Simplify right side
    6,479.85x = 17,498,106.05
  5. Step 5: Solve for x
    x = 17,498,106.05/6,479.85
  6. Step 6: Final answer
    x = 2,700.39

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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.