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Finding the Fourth Proportional to 8,133.20, 12,199.80 and 5,541.20

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Solution

The fourth proportional to 8,133.20, 12,199.80 and 5,541.20 is: 8,311.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,133.20 : 12,199.80 = 5,541.20 : x
  2. Step 2: Convert to fraction form
    8,133.20/12,199.80 = 5,541.20/x
  3. Step 3: Cross multiply
    8,133.20x = 12,199.80 × 5,541.20
  4. Step 4: Simplify right side
    8,133.20x = 67,601,531.76
  5. Step 5: Solve for x
    x = 67,601,531.76/8,133.20
  6. Step 6: Final answer
    x = 8,311.80

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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.