Home / 20,106.32-30,133.32-11,221.28

Finding the Fourth Proportional to 20,106.32, 30,133.32 and 11,221.28

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Solution

The fourth proportional to 20,106.32, 30,133.32 and 11,221.28 is: 16,817.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.32 : 30,133.32 = 11,221.28 : x
  2. Step 2: Convert to fraction form
    20,106.32/30,133.32 = 11,221.28/x
  3. Step 3: Cross multiply
    20,106.32x = 30,133.32 × 11,221.28
  4. Step 4: Simplify right side
    20,106.32x = 338,134,421.05
  5. Step 5: Solve for x
    x = 338,134,421.05/20,106.32
  6. Step 6: Final answer
    x = 16,817.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.