Home / 30,994.56-42,785.60-20,936.64

Finding the Fourth Proportional to 30,994.56, 42,785.60 and 20,936.64

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Solution

The fourth proportional to 30,994.56, 42,785.60 and 20,936.64 is: 28,901.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,994.56 : 42,785.60 = 20,936.64 : x
  2. Step 2: Convert to fraction form
    30,994.56/42,785.60 = 20,936.64/x
  3. Step 3: Cross multiply
    30,994.56x = 42,785.60 × 20,936.64
  4. Step 4: Simplify right side
    30,994.56x = 895,786,704.38
  5. Step 5: Solve for x
    x = 895,786,704.38/30,994.56
  6. Step 6: Final answer
    x = 28,901.42

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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.