Home / 13,669.38-18,740.72-13,420.27

Finding the Fourth Proportional to 13,669.38, 18,740.72 and 13,420.27

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Solution

The fourth proportional to 13,669.38, 18,740.72 and 13,420.27 is: 18,399.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,669.38 : 18,740.72 = 13,420.27 : x
  2. Step 2: Convert to fraction form
    13,669.38/18,740.72 = 13,420.27/x
  3. Step 3: Cross multiply
    13,669.38x = 18,740.72 × 13,420.27
  4. Step 4: Simplify right side
    13,669.38x = 251,505,591.95
  5. Step 5: Solve for x
    x = 251,505,591.95/13,669.38
  6. Step 6: Final answer
    x = 18,399.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.