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Finding the Fourth Proportional to 8,453.20, 12,679.80 and 6,266.20

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Solution

The fourth proportional to 8,453.20, 12,679.80 and 6,266.20 is: 9,399.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,453.20 : 12,679.80 = 6,266.20 : x
  2. Step 2: Convert to fraction form
    8,453.20/12,679.80 = 6,266.20/x
  3. Step 3: Cross multiply
    8,453.20x = 12,679.80 × 6,266.20
  4. Step 4: Simplify right side
    8,453.20x = 79,454,162.76
  5. Step 5: Solve for x
    x = 79,454,162.76/8,453.20
  6. Step 6: Final answer
    x = 9,399.30

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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.