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Finding the Fourth Proportional to 8,131.80, 12,197.70 and 4,843.20

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Solution

The fourth proportional to 8,131.80, 12,197.70 and 4,843.20 is: 7,264.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,131.80 : 12,197.70 = 4,843.20 : x
  2. Step 2: Convert to fraction form
    8,131.80/12,197.70 = 4,843.20/x
  3. Step 3: Cross multiply
    8,131.80x = 12,197.70 × 4,843.20
  4. Step 4: Simplify right side
    8,131.80x = 59,075,900.64
  5. Step 5: Solve for x
    x = 59,075,900.64/8,131.80
  6. Step 6: Final answer
    x = 7,264.80

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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.