Home / 21,571.77-29,764.47-13,609.38

Finding the Fourth Proportional to 21,571.77, 29,764.47 and 13,609.38

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Solution

The fourth proportional to 21,571.77, 29,764.47 and 13,609.38 is: 18,778.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,571.77 : 29,764.47 = 13,609.38 : x
  2. Step 2: Convert to fraction form
    21,571.77/29,764.47 = 13,609.38/x
  3. Step 3: Cross multiply
    21,571.77x = 29,764.47 × 13,609.38
  4. Step 4: Simplify right side
    21,571.77x = 405,075,982.73
  5. Step 5: Solve for x
    x = 405,075,982.73/21,571.77
  6. Step 6: Final answer
    x = 18,778.06

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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.