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Finding the Fourth Proportional to 8,860.65, 13,286.31 and 3,928.15

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Solution

The fourth proportional to 8,860.65, 13,286.31 and 3,928.15 is: 5,890.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,860.65 : 13,286.31 = 3,928.15 : x
  2. Step 2: Convert to fraction form
    8,860.65/13,286.31 = 3,928.15/x
  3. Step 3: Cross multiply
    8,860.65x = 13,286.31 × 3,928.15
  4. Step 4: Simplify right side
    8,860.65x = 52,190,618.63
  5. Step 5: Solve for x
    x = 52,190,618.63/8,860.65
  6. Step 6: Final answer
    x = 5,890.16

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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.