Home / 21,721.01-29,966.08-13,216.31

Finding the Fourth Proportional to 21,721.01, 29,966.08 and 13,216.31

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Solution

The fourth proportional to 21,721.01, 29,966.08 and 13,216.31 is: 18,233.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.01 : 29,966.08 = 13,216.31 : x
  2. Step 2: Convert to fraction form
    21,721.01/29,966.08 = 13,216.31/x
  3. Step 3: Cross multiply
    21,721.01x = 29,966.08 × 13,216.31
  4. Step 4: Simplify right side
    21,721.01x = 396,040,932.27
  5. Step 5: Solve for x
    x = 396,040,932.27/21,721.01
  6. Step 6: Final answer
    x = 18,233.09

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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.