Home / 20,836.20-31,205.70-20,418.60

Finding the Fourth Proportional to 20,836.20, 31,205.70 and 20,418.60

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Solution

The fourth proportional to 20,836.20, 31,205.70 and 20,418.60 is: 30,580.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.20 : 31,205.70 = 20,418.60 : x
  2. Step 2: Convert to fraction form
    20,836.20/31,205.70 = 20,418.60/x
  3. Step 3: Cross multiply
    20,836.20x = 31,205.70 × 20,418.60
  4. Step 4: Simplify right side
    20,836.20x = 637,176,706.02
  5. Step 5: Solve for x
    x = 637,176,706.02/20,836.20
  6. Step 6: Final answer
    x = 30,580.27

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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.