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Finding the Fourth Proportional to 36,420.71, 50,260.01 and 20,505.20

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Solution

The fourth proportional to 36,420.71, 50,260.01 and 20,505.20 is: 28,296.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,420.71 : 50,260.01 = 20,505.20 : x
  2. Step 2: Convert to fraction form
    36,420.71/50,260.01 = 20,505.20/x
  3. Step 3: Cross multiply
    36,420.71x = 50,260.01 × 20,505.20
  4. Step 4: Simplify right side
    36,420.71x = 1,030,591,203.23
  5. Step 5: Solve for x
    x = 1,030,591,203.23/36,420.71
  6. Step 6: Final answer
    x = 28,296.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.