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Finding the Fourth Proportional to 13,392.10, 20,088.15 and 11,221.30

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Solution

The fourth proportional to 13,392.10, 20,088.15 and 11,221.30 is: 16,831.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.10 : 20,088.15 = 11,221.30 : x
  2. Step 2: Convert to fraction form
    13,392.10/20,088.15 = 11,221.30/x
  3. Step 3: Cross multiply
    13,392.10x = 20,088.15 × 11,221.30
  4. Step 4: Simplify right side
    13,392.10x = 225,415,157.60
  5. Step 5: Solve for x
    x = 225,415,157.60/13,392.10
  6. Step 6: Final answer
    x = 16,831.95

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Similar ratio
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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.