Home / 19,821.23-29,736.80-13,989.23

Finding the Fourth Proportional to 19,821.23, 29,736.80 and 13,989.23

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Solution

The fourth proportional to 19,821.23, 29,736.80 and 13,989.23 is: 20,987.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,821.23 : 29,736.80 = 13,989.23 : x
  2. Step 2: Convert to fraction form
    19,821.23/29,736.80 = 13,989.23/x
  3. Step 3: Cross multiply
    19,821.23x = 29,736.80 × 13,989.23
  4. Step 4: Simplify right side
    19,821.23x = 415,994,934.66
  5. Step 5: Solve for x
    x = 415,994,934.66/19,821.23
  6. Step 6: Final answer
    x = 20,987.34

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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.