Home / 20,142.30-30,201.45-12,356.70

Finding the Fourth Proportional to 20,142.30, 30,201.45 and 12,356.70

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Solution

The fourth proportional to 20,142.30, 30,201.45 and 12,356.70 is: 18,527.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.30 : 30,201.45 = 12,356.70 : x
  2. Step 2: Convert to fraction form
    20,142.30/30,201.45 = 12,356.70/x
  3. Step 3: Cross multiply
    20,142.30x = 30,201.45 × 12,356.70
  4. Step 4: Simplify right side
    20,142.30x = 373,190,257.22
  5. Step 5: Solve for x
    x = 373,190,257.22/20,142.30
  6. Step 6: Final answer
    x = 18,527.69

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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.