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Finding the Fourth Proportional to 8,252.20, 12,378.30 and 8,009.20

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Solution

The fourth proportional to 8,252.20, 12,378.30 and 8,009.20 is: 12,013.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,252.20 : 12,378.30 = 8,009.20 : x
  2. Step 2: Convert to fraction form
    8,252.20/12,378.30 = 8,009.20/x
  3. Step 3: Cross multiply
    8,252.20x = 12,378.30 × 8,009.20
  4. Step 4: Simplify right side
    8,252.20x = 99,140,280.36
  5. Step 5: Solve for x
    x = 99,140,280.36/8,252.20
  6. Step 6: Final answer
    x = 12,013.80

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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.