Home / 20,490.15-30,729.60-12,982.44

Finding the Fourth Proportional to 20,490.15, 30,729.60 and 12,982.44

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Solution

The fourth proportional to 20,490.15, 30,729.60 and 12,982.44 is: 19,470.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.15 : 30,729.60 = 12,982.44 : x
  2. Step 2: Convert to fraction form
    20,490.15/30,729.60 = 12,982.44/x
  3. Step 3: Cross multiply
    20,490.15x = 30,729.60 × 12,982.44
  4. Step 4: Simplify right side
    20,490.15x = 398,945,188.22
  5. Step 5: Solve for x
    x = 398,945,188.22/20,490.15
  6. Step 6: Final answer
    x = 19,470.10

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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.