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Finding the Fourth Proportional to 20,009.30, 30,010.80 and 12,591.06

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Solution

The fourth proportional to 20,009.30, 30,010.80 and 12,591.06 is: 18,884.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,009.30 : 30,010.80 = 12,591.06 : x
  2. Step 2: Convert to fraction form
    20,009.30/30,010.80 = 12,591.06/x
  3. Step 3: Cross multiply
    20,009.30x = 30,010.80 × 12,591.06
  4. Step 4: Simplify right side
    20,009.30x = 377,867,783.45
  5. Step 5: Solve for x
    x = 377,867,783.45/20,009.30
  6. Step 6: Final answer
    x = 18,884.61

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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.