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Finding the Fourth Proportional to 7,323.78, 10,980.90 and 4,161.30

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Solution

The fourth proportional to 7,323.78, 10,980.90 and 4,161.30 is: 6,239.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,323.78 : 10,980.90 = 4,161.30 : x
  2. Step 2: Convert to fraction form
    7,323.78/10,980.90 = 4,161.30/x
  3. Step 3: Cross multiply
    7,323.78x = 10,980.90 × 4,161.30
  4. Step 4: Simplify right side
    7,323.78x = 45,694,819.17
  5. Step 5: Solve for x
    x = 45,694,819.17/7,323.78
  6. Step 6: Final answer
    x = 6,239.24

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1.5x scale

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.