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Finding the Fourth Proportional to 18,680.90, 28,023.98 and 6,993

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Solution

The fourth proportional to 18,680.90, 28,023.98 and 6,993 is: 10,490.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.90 : 28,023.98 = 6,993 : x
  2. Step 2: Convert to fraction form
    18,680.90/28,023.98 = 6,993/x
  3. Step 3: Cross multiply
    18,680.90x = 28,023.98 × 6,993
  4. Step 4: Simplify right side
    18,680.90x = 195,971,657.18
  5. Step 5: Solve for x
    x = 195,971,657.18/18,680.90
  6. Step 6: Final answer
    x = 10,490.49

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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.