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Finding the Fourth Proportional to 8,615.65, 12,913.09 and 4,453.42

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Solution

The fourth proportional to 8,615.65, 12,913.09 and 4,453.42 is: 6,674.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.65 : 12,913.09 = 4,453.42 : x
  2. Step 2: Convert to fraction form
    8,615.65/12,913.09 = 4,453.42/x
  3. Step 3: Cross multiply
    8,615.65x = 12,913.09 × 4,453.42
  4. Step 4: Simplify right side
    8,615.65x = 57,507,413.27
  5. Step 5: Solve for x
    x = 57,507,413.27/8,615.65
  6. Step 6: Final answer
    x = 6,674.76

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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.