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Finding the Fourth Proportional to 13,664.20, 20,496.30 and 12,133.30

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Solution

The fourth proportional to 13,664.20, 20,496.30 and 12,133.30 is: 18,199.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,664.20 : 20,496.30 = 12,133.30 : x
  2. Step 2: Convert to fraction form
    13,664.20/20,496.30 = 12,133.30/x
  3. Step 3: Cross multiply
    13,664.20x = 20,496.30 × 12,133.30
  4. Step 4: Simplify right side
    13,664.20x = 248,687,756.79
  5. Step 5: Solve for x
    x = 248,687,756.79/13,664.20
  6. Step 6: Final answer
    x = 18,199.95

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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.