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Finding the Fourth Proportional to 21,759.88, 30,028.67 and 12,329.08

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Solution

The fourth proportional to 21,759.88, 30,028.67 and 12,329.08 is: 17,014.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,759.88 : 30,028.67 = 12,329.08 : x
  2. Step 2: Convert to fraction form
    21,759.88/30,028.67 = 12,329.08/x
  3. Step 3: Cross multiply
    21,759.88x = 30,028.67 × 12,329.08
  4. Step 4: Simplify right side
    21,759.88x = 370,225,662.93
  5. Step 5: Solve for x
    x = 370,225,662.93/21,759.88
  6. Step 6: Final answer
    x = 17,014.14

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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.