Home / 48,680.20-72,979.80-20,621.80

Finding the Fourth Proportional to 48,680.20, 72,979.80 and 20,621.80

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Solution

The fourth proportional to 48,680.20, 72,979.80 and 20,621.80 is: 30,915.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,680.20 : 72,979.80 = 20,621.80 : x
  2. Step 2: Convert to fraction form
    48,680.20/72,979.80 = 20,621.80/x
  3. Step 3: Cross multiply
    48,680.20x = 72,979.80 × 20,621.80
  4. Step 4: Simplify right side
    48,680.20x = 1,504,974,839.64
  5. Step 5: Solve for x
    x = 1,504,974,839.64/48,680.20
  6. Step 6: Final answer
    x = 30,915.54

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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.