Home / 8,321.20-11,485.10-5,295.70

Finding the Fourth Proportional to 8,321.20, 11,485.10 and 5,295.70

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Solution

The fourth proportional to 8,321.20, 11,485.10 and 5,295.70 is: 7,309.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.20 : 11,485.10 = 5,295.70 : x
  2. Step 2: Convert to fraction form
    8,321.20/11,485.10 = 5,295.70/x
  3. Step 3: Cross multiply
    8,321.20x = 11,485.10 × 5,295.70
  4. Step 4: Simplify right side
    8,321.20x = 60,821,644.07
  5. Step 5: Solve for x
    x = 60,821,644.07/8,321.20
  6. Step 6: Final answer
    x = 7,309.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.