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Finding the Fourth Proportional to 8,480.40, 12,728.70 and 4,325.10

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Solution

The fourth proportional to 8,480.40, 12,728.70 and 4,325.10 is: 6,491.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.40 : 12,728.70 = 4,325.10 : x
  2. Step 2: Convert to fraction form
    8,480.40/12,728.70 = 4,325.10/x
  3. Step 3: Cross multiply
    8,480.40x = 12,728.70 × 4,325.10
  4. Step 4: Simplify right side
    8,480.40x = 55,052,900.37
  5. Step 5: Solve for x
    x = 55,052,900.37/8,480.40
  6. Step 6: Final answer
    x = 6,491.78

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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.