Home / 21,322.24-29,420.22-11,890.60

Finding the Fourth Proportional to 21,322.24, 29,420.22 and 11,890.60

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Solution

The fourth proportional to 21,322.24, 29,420.22 and 11,890.60 is: 16,406.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,322.24 : 29,420.22 = 11,890.60 : x
  2. Step 2: Convert to fraction form
    21,322.24/29,420.22 = 11,890.60/x
  3. Step 3: Cross multiply
    21,322.24x = 29,420.22 × 11,890.60
  4. Step 4: Simplify right side
    21,322.24x = 349,824,067.93
  5. Step 5: Solve for x
    x = 349,824,067.93/21,322.24
  6. Step 6: Final answer
    x = 16,406.53

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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.