Home / 21,759.66-30,028.30-12,328.20

Finding the Fourth Proportional to 21,759.66, 30,028.30 and 12,328.20

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Solution

The fourth proportional to 21,759.66, 30,028.30 and 12,328.20 is: 17,012.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,759.66 : 30,028.30 = 12,328.20 : x
  2. Step 2: Convert to fraction form
    21,759.66/30,028.30 = 12,328.20/x
  3. Step 3: Cross multiply
    21,759.66x = 30,028.30 × 12,328.20
  4. Step 4: Simplify right side
    21,759.66x = 370,194,857.24
  5. Step 5: Solve for x
    x = 370,194,857.24/21,759.66
  6. Step 6: Final answer
    x = 17,012.90

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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.