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Finding the Fourth Proportional to 7,324.80, 10,987.20 and 2,945.40

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Solution

The fourth proportional to 7,324.80, 10,987.20 and 2,945.40 is: 4,418.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,324.80 : 10,987.20 = 2,945.40 : x
  2. Step 2: Convert to fraction form
    7,324.80/10,987.20 = 2,945.40/x
  3. Step 3: Cross multiply
    7,324.80x = 10,987.20 × 2,945.40
  4. Step 4: Simplify right side
    7,324.80x = 32,361,698.88
  5. Step 5: Solve for x
    x = 32,361,698.88/7,324.80
  6. Step 6: Final answer
    x = 4,418.10

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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.