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Finding the Fourth Proportional to 12,668.04, 18,981.54 and 7,722.72

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Solution

The fourth proportional to 12,668.04, 18,981.54 and 7,722.72 is: 11,571.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,668.04 : 18,981.54 = 7,722.72 : x
  2. Step 2: Convert to fraction form
    12,668.04/18,981.54 = 7,722.72/x
  3. Step 3: Cross multiply
    12,668.04x = 18,981.54 × 7,722.72
  4. Step 4: Simplify right side
    12,668.04x = 146,589,118.59
  5. Step 5: Solve for x
    x = 146,589,118.59/12,668.04
  6. Step 6: Final answer
    x = 11,571.57

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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.