Home / 28,180.53-42,270.80-7,120.64

Finding the Fourth Proportional to 28,180.53, 42,270.80 and 7,120.64

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Solution

The fourth proportional to 28,180.53, 42,270.80 and 7,120.64 is: 10,680.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.53 : 42,270.80 = 7,120.64 : x
  2. Step 2: Convert to fraction form
    28,180.53/42,270.80 = 7,120.64/x
  3. Step 3: Cross multiply
    28,180.53x = 42,270.80 × 7,120.64
  4. Step 4: Simplify right side
    28,180.53x = 300,994,902.35
  5. Step 5: Solve for x
    x = 300,994,902.35/28,180.53
  6. Step 6: Final answer
    x = 10,680.95

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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.