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Finding the Fourth Proportional to 18,956.19, 28,375.97 and 12,368.19

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Solution

The fourth proportional to 18,956.19, 28,375.97 and 12,368.19 is: 18,514.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956.19 : 28,375.97 = 12,368.19 : x
  2. Step 2: Convert to fraction form
    18,956.19/28,375.97 = 12,368.19/x
  3. Step 3: Cross multiply
    18,956.19x = 28,375.97 × 12,368.19
  4. Step 4: Simplify right side
    18,956.19x = 350,959,326.55
  5. Step 5: Solve for x
    x = 350,959,326.55/18,956.19
  6. Step 6: Final answer
    x = 18,514.23

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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.