Home / 19,821.36-29,736.99-13,989.36

Finding the Fourth Proportional to 19,821.36, 29,736.99 and 13,989.36

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Solution

The fourth proportional to 19,821.36, 29,736.99 and 13,989.36 is: 20,987.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,821.36 : 29,736.99 = 13,989.36 : x
  2. Step 2: Convert to fraction form
    19,821.36/29,736.99 = 13,989.36/x
  3. Step 3: Cross multiply
    19,821.36x = 29,736.99 × 13,989.36
  4. Step 4: Simplify right side
    19,821.36x = 416,001,458.43
  5. Step 5: Solve for x
    x = 416,001,458.43/19,821.36
  6. Step 6: Final answer
    x = 20,987.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.