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Finding the Fourth Proportional to 20,604.60, 30,886.08 and 8,133.42

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Solution

The fourth proportional to 20,604.60, 30,886.08 and 8,133.42 is: 12,191.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,604.60 : 30,886.08 = 8,133.42 : x
  2. Step 2: Convert to fraction form
    20,604.60/30,886.08 = 8,133.42/x
  3. Step 3: Cross multiply
    20,604.60x = 30,886.08 × 8,133.42
  4. Step 4: Simplify right side
    20,604.60x = 251,209,460.79
  5. Step 5: Solve for x
    x = 251,209,460.79/20,604.60
  6. Step 6: Final answer
    x = 12,191.91

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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.