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Finding the Fourth Proportional to 10,605.67, 15,907.29 and 2,815.09

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Solution

The fourth proportional to 10,605.67, 15,907.29 and 2,815.09 is: 4,222.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,605.67 : 15,907.29 = 2,815.09 : x
  2. Step 2: Convert to fraction form
    10,605.67/15,907.29 = 2,815.09/x
  3. Step 3: Cross multiply
    10,605.67x = 15,907.29 × 2,815.09
  4. Step 4: Simplify right side
    10,605.67x = 44,780,453.01
  5. Step 5: Solve for x
    x = 44,780,453.01/10,605.67
  6. Step 6: Final answer
    x = 4,222.31

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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.