Home / 21,698.90-29,939.62-13,205.46

Finding the Fourth Proportional to 21,698.90, 29,939.62 and 13,205.46

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Solution

The fourth proportional to 21,698.90, 29,939.62 and 13,205.46 is: 18,220.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,698.90 : 29,939.62 = 13,205.46 : x
  2. Step 2: Convert to fraction form
    21,698.90/29,939.62 = 13,205.46/x
  3. Step 3: Cross multiply
    21,698.90x = 29,939.62 × 13,205.46
  4. Step 4: Simplify right side
    21,698.90x = 395,366,454.33
  5. Step 5: Solve for x
    x = 395,366,454.33/21,698.90
  6. Step 6: Final answer
    x = 18,220.58

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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.