Home / 21,479.36-29,643.30-11,920.14

Finding the Fourth Proportional to 21,479.36, 29,643.30 and 11,920.14

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Solution

The fourth proportional to 21,479.36, 29,643.30 and 11,920.14 is: 16,450.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,479.36 : 29,643.30 = 11,920.14 : x
  2. Step 2: Convert to fraction form
    21,479.36/29,643.30 = 11,920.14/x
  3. Step 3: Cross multiply
    21,479.36x = 29,643.30 × 11,920.14
  4. Step 4: Simplify right side
    21,479.36x = 353,352,286.06
  5. Step 5: Solve for x
    x = 353,352,286.06/21,479.36
  6. Step 6: Final answer
    x = 16,450.78

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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.