Home / 21,759.75-30,029.67-12,331.35

Finding the Fourth Proportional to 21,759.75, 30,029.67 and 12,331.35

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Solution

The fourth proportional to 21,759.75, 30,029.67 and 12,331.35 is: 17,017.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,759.75 : 30,029.67 = 12,331.35 : x
  2. Step 2: Convert to fraction form
    21,759.75/30,029.67 = 12,331.35/x
  3. Step 3: Cross multiply
    21,759.75x = 30,029.67 × 12,331.35
  4. Step 4: Simplify right side
    21,759.75x = 370,306,371.15
  5. Step 5: Solve for x
    x = 370,306,371.15/21,759.75
  6. Step 6: Final answer
    x = 17,017.95

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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.