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Finding the Fourth Proportional to 18,907.70, 26,128.61 and 14,183.78

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Solution

The fourth proportional to 18,907.70, 26,128.61 and 14,183.78 is: 19,600.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.70 : 26,128.61 = 14,183.78 : x
  2. Step 2: Convert to fraction form
    18,907.70/26,128.61 = 14,183.78/x
  3. Step 3: Cross multiply
    18,907.70x = 26,128.61 × 14,183.78
  4. Step 4: Simplify right side
    18,907.70x = 370,602,455.95
  5. Step 5: Solve for x
    x = 370,602,455.95/18,907.70
  6. Step 6: Final answer
    x = 19,600.61

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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.