Home / 21,069.27-29,081.39-13,106.75

Finding the Fourth Proportional to 21,069.27, 29,081.39 and 13,106.75

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Solution

The fourth proportional to 21,069.27, 29,081.39 and 13,106.75 is: 18,090.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.27 : 29,081.39 = 13,106.75 : x
  2. Step 2: Convert to fraction form
    21,069.27/29,081.39 = 13,106.75/x
  3. Step 3: Cross multiply
    21,069.27x = 29,081.39 × 13,106.75
  4. Step 4: Simplify right side
    21,069.27x = 381,162,297.44
  5. Step 5: Solve for x
    x = 381,162,297.44/21,069.27
  6. Step 6: Final answer
    x = 18,090.91

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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.