Home / 13,786.25-19,028.40-7,821.41

Finding the Fourth Proportional to 13,786.25, 19,028.40 and 7,821.41

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Solution

The fourth proportional to 13,786.25, 19,028.40 and 7,821.41 is: 10,795.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.25 : 19,028.40 = 7,821.41 : x
  2. Step 2: Convert to fraction form
    13,786.25/19,028.40 = 7,821.41/x
  3. Step 3: Cross multiply
    13,786.25x = 19,028.40 × 7,821.41
  4. Step 4: Simplify right side
    13,786.25x = 148,828,918.04
  5. Step 5: Solve for x
    x = 148,828,918.04/13,786.25
  6. Step 6: Final answer
    x = 10,795.46

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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.