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Finding the Fourth Proportional to 8,009.65, 12,015.20 and 2,815.57

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Solution

The fourth proportional to 8,009.65, 12,015.20 and 2,815.57 is: 4,223.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,009.65 : 12,015.20 = 2,815.57 : x
  2. Step 2: Convert to fraction form
    8,009.65/12,015.20 = 2,815.57/x
  3. Step 3: Cross multiply
    8,009.65x = 12,015.20 × 2,815.57
  4. Step 4: Simplify right side
    8,009.65x = 33,829,636.66
  5. Step 5: Solve for x
    x = 33,829,636.66/8,009.65
  6. Step 6: Final answer
    x = 4,223.61

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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.