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Finding the Fourth Proportional to 18,706.93, 28,076.79 and 7,613.57

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Solution

The fourth proportional to 18,706.93, 28,076.79 and 7,613.57 is: 11,427.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.93 : 28,076.79 = 7,613.57 : x
  2. Step 2: Convert to fraction form
    18,706.93/28,076.79 = 7,613.57/x
  3. Step 3: Cross multiply
    18,706.93x = 28,076.79 × 7,613.57
  4. Step 4: Simplify right side
    18,706.93x = 213,764,606.04
  5. Step 5: Solve for x
    x = 213,764,606.04/18,706.93
  6. Step 6: Final answer
    x = 11,427.03

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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.