Home / 31,893.20-47,839.80-20,219.60

Finding the Fourth Proportional to 31,893.20, 47,839.80 and 20,219.60

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Solution

The fourth proportional to 31,893.20, 47,839.80 and 20,219.60 is: 30,329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,893.20 : 47,839.80 = 20,219.60 : x
  2. Step 2: Convert to fraction form
    31,893.20/47,839.80 = 20,219.60/x
  3. Step 3: Cross multiply
    31,893.20x = 47,839.80 × 20,219.60
  4. Step 4: Simplify right side
    31,893.20x = 967,301,620.08
  5. Step 5: Solve for x
    x = 967,301,620.08/31,893.20
  6. Step 6: Final answer
    x = 30,329.40

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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.