Home / 20,886.05-28,820.09-11,934.14

Finding the Fourth Proportional to 20,886.05, 28,820.09 and 11,934.14

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Solution

The fourth proportional to 20,886.05, 28,820.09 and 11,934.14 is: 16,467.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.05 : 28,820.09 = 11,934.14 : x
  2. Step 2: Convert to fraction form
    20,886.05/28,820.09 = 11,934.14/x
  3. Step 3: Cross multiply
    20,886.05x = 28,820.09 × 11,934.14
  4. Step 4: Simplify right side
    20,886.05x = 343,942,785.10
  5. Step 5: Solve for x
    x = 343,942,785.10/20,886.05
  6. Step 6: Final answer
    x = 16,467.58

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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.