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Finding the Fourth Proportional to 8,674.80, 13,012.20 and 5,391.60

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Solution

The fourth proportional to 8,674.80, 13,012.20 and 5,391.60 is: 8,087.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,674.80 : 13,012.20 = 5,391.60 : x
  2. Step 2: Convert to fraction form
    8,674.80/13,012.20 = 5,391.60/x
  3. Step 3: Cross multiply
    8,674.80x = 13,012.20 × 5,391.60
  4. Step 4: Simplify right side
    8,674.80x = 70,156,577.52
  5. Step 5: Solve for x
    x = 70,156,577.52/8,674.80
  6. Step 6: Final answer
    x = 8,087.40

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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.