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Finding the Fourth Proportional to 18,951.35, 28,390.07 and 11,537.42

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Solution

The fourth proportional to 18,951.35, 28,390.07 and 11,537.42 is: 17,283.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,951.35 : 28,390.07 = 11,537.42 : x
  2. Step 2: Convert to fraction form
    18,951.35/28,390.07 = 11,537.42/x
  3. Step 3: Cross multiply
    18,951.35x = 28,390.07 × 11,537.42
  4. Step 4: Simplify right side
    18,951.35x = 327,548,048.31
  5. Step 5: Solve for x
    x = 327,548,048.31/18,951.35
  6. Step 6: Final answer
    x = 17,283.63

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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.