Home / 13,670.38-18,742.09-13,421.27

Finding the Fourth Proportional to 13,670.38, 18,742.09 and 13,421.27

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Solution

The fourth proportional to 13,670.38, 18,742.09 and 13,421.27 is: 18,400.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.38 : 18,742.09 = 13,421.27 : x
  2. Step 2: Convert to fraction form
    13,670.38/18,742.09 = 13,421.27/x
  3. Step 3: Cross multiply
    13,670.38x = 18,742.09 × 13,421.27
  4. Step 4: Simplify right side
    13,670.38x = 251,542,650.25
  5. Step 5: Solve for x
    x = 251,542,650.25/13,670.38
  6. Step 6: Final answer
    x = 18,400.56

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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.