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Finding the Fourth Proportional to 28,000.21, 41,999.82 and 6,940.21

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Solution

The fourth proportional to 28,000.21, 41,999.82 and 6,940.21 is: 10,410.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,000.21 : 41,999.82 = 6,940.21 : x
  2. Step 2: Convert to fraction form
    28,000.21/41,999.82 = 6,940.21/x
  3. Step 3: Cross multiply
    28,000.21x = 41,999.82 × 6,940.21
  4. Step 4: Simplify right side
    28,000.21x = 291,487,570.76
  5. Step 5: Solve for x
    x = 291,487,570.76/28,000.21
  6. Step 6: Final answer
    x = 10,410.19

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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.