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Finding the Fourth Proportional to 18,812.97, 25,956.74 and 11,639.45

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Solution

The fourth proportional to 18,812.97, 25,956.74 and 11,639.45 is: 16,059.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.97 : 25,956.74 = 11,639.45 : x
  2. Step 2: Convert to fraction form
    18,812.97/25,956.74 = 11,639.45/x
  3. Step 3: Cross multiply
    18,812.97x = 25,956.74 × 11,639.45
  4. Step 4: Simplify right side
    18,812.97x = 302,122,033.06
  5. Step 5: Solve for x
    x = 302,122,033.06/18,812.97
  6. Step 6: Final answer
    x = 16,059.24

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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.