Home / 21,863.81-30,174.38-13,370.90

Finding the Fourth Proportional to 21,863.81, 30,174.38 and 13,370.90

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Solution

The fourth proportional to 21,863.81, 30,174.38 and 13,370.90 is: 18,453.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,863.81 : 30,174.38 = 13,370.90 : x
  2. Step 2: Convert to fraction form
    21,863.81/30,174.38 = 13,370.90/x
  3. Step 3: Cross multiply
    21,863.81x = 30,174.38 × 13,370.90
  4. Step 4: Simplify right side
    21,863.81x = 403,458,399.82
  5. Step 5: Solve for x
    x = 403,458,399.82/21,863.81
  6. Step 6: Final answer
    x = 18,453.26

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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.