Home / 20,420.60-30,614.70-11,186.60

Finding the Fourth Proportional to 20,420.60, 30,614.70 and 11,186.60

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Solution

The fourth proportional to 20,420.60, 30,614.70 and 11,186.60 is: 16,771.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.60 : 30,614.70 = 11,186.60 : x
  2. Step 2: Convert to fraction form
    20,420.60/30,614.70 = 11,186.60/x
  3. Step 3: Cross multiply
    20,420.60x = 30,614.70 × 11,186.60
  4. Step 4: Simplify right side
    20,420.60x = 342,474,403.02
  5. Step 5: Solve for x
    x = 342,474,403.02/20,420.60
  6. Step 6: Final answer
    x = 16,771.03

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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.