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Finding the Fourth Proportional to 36,820.40, 55,230.60 and 20,231.60

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Solution

The fourth proportional to 36,820.40, 55,230.60 and 20,231.60 is: 30,347.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,820.40 : 55,230.60 = 20,231.60 : x
  2. Step 2: Convert to fraction form
    36,820.40/55,230.60 = 20,231.60/x
  3. Step 3: Cross multiply
    36,820.40x = 55,230.60 × 20,231.60
  4. Step 4: Simplify right side
    36,820.40x = 1,117,403,406.96
  5. Step 5: Solve for x
    x = 1,117,403,406.96/36,820.40
  6. Step 6: Final answer
    x = 30,347.40

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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.