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Finding the Fourth Proportional to 28,751.45, 43,127.16 and 7,974.95

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Solution

The fourth proportional to 28,751.45, 43,127.16 and 7,974.95 is: 11,962.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,751.45 : 43,127.16 = 7,974.95 : x
  2. Step 2: Convert to fraction form
    28,751.45/43,127.16 = 7,974.95/x
  3. Step 3: Cross multiply
    28,751.45x = 43,127.16 × 7,974.95
  4. Step 4: Simplify right side
    28,751.45x = 343,936,729.01
  5. Step 5: Solve for x
    x = 343,936,729.01/28,751.45
  6. Step 6: Final answer
    x = 11,962.42

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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.