Home / 20,116.40-30,142.20-16,811.60

Finding the Fourth Proportional to 20,116.40, 30,142.20 and 16,811.60

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Solution

The fourth proportional to 20,116.40, 30,142.20 and 16,811.60 is: 25,190.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,116.40 : 30,142.20 = 16,811.60 : x
  2. Step 2: Convert to fraction form
    20,116.40/30,142.20 = 16,811.60/x
  3. Step 3: Cross multiply
    20,116.40x = 30,142.20 × 16,811.60
  4. Step 4: Simplify right side
    20,116.40x = 506,738,609.52
  5. Step 5: Solve for x
    x = 506,738,609.52/20,116.40
  6. Step 6: Final answer
    x = 25,190.32

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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.