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Finding the Fourth Proportional to 18,810.20, 28,206.24 and 6,956

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Solution

The fourth proportional to 18,810.20, 28,206.24 and 6,956 is: 10,430.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.20 : 28,206.24 = 6,956 : x
  2. Step 2: Convert to fraction form
    18,810.20/28,206.24 = 6,956/x
  3. Step 3: Cross multiply
    18,810.20x = 28,206.24 × 6,956
  4. Step 4: Simplify right side
    18,810.20x = 196,202,605.44
  5. Step 5: Solve for x
    x = 196,202,605.44/18,810.20
  6. Step 6: Final answer
    x = 10,430.65

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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.