Home / 21,049.97-29,036.36-15,377.79

Finding the Fourth Proportional to 21,049.97, 29,036.36 and 15,377.79

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Solution

The fourth proportional to 21,049.97, 29,036.36 and 15,377.79 is: 21,212.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,049.97 : 29,036.36 = 15,377.79 : x
  2. Step 2: Convert to fraction form
    21,049.97/29,036.36 = 15,377.79/x
  3. Step 3: Cross multiply
    21,049.97x = 29,036.36 × 15,377.79
  4. Step 4: Simplify right side
    21,049.97x = 446,514,969.56
  5. Step 5: Solve for x
    x = 446,514,969.56/21,049.97
  6. Step 6: Final answer
    x = 21,212.14

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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.