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Finding the Fourth Proportional to 12,792.64, 17,660.74 and 8,975.96

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Solution

The fourth proportional to 12,792.64, 17,660.74 and 8,975.96 is: 12,391.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,792.64 : 17,660.74 = 8,975.96 : x
  2. Step 2: Convert to fraction form
    12,792.64/17,660.74 = 8,975.96/x
  3. Step 3: Cross multiply
    12,792.64x = 17,660.74 × 8,975.96
  4. Step 4: Simplify right side
    12,792.64x = 158,522,095.81
  5. Step 5: Solve for x
    x = 158,522,095.81/12,792.64
  6. Step 6: Final answer
    x = 12,391.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.