Home / 21,455.81-29,610.77-11,896.65

Finding the Fourth Proportional to 21,455.81, 29,610.77 and 11,896.65

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Solution

The fourth proportional to 21,455.81, 29,610.77 and 11,896.65 is: 16,418.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.81 : 29,610.77 = 11,896.65 : x
  2. Step 2: Convert to fraction form
    21,455.81/29,610.77 = 11,896.65/x
  3. Step 3: Cross multiply
    21,455.81x = 29,610.77 × 11,896.65
  4. Step 4: Simplify right side
    21,455.81x = 352,268,824.16
  5. Step 5: Solve for x
    x = 352,268,824.16/21,455.81
  6. Step 6: Final answer
    x = 16,418.34

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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.