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Finding the Fourth Proportional to 18,843.20, 25,988 and 14,137.92

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Solution

The fourth proportional to 18,843.20, 25,988 and 14,137.92 is: 19,498.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.20 : 25,988 = 14,137.92 : x
  2. Step 2: Convert to fraction form
    18,843.20/25,988 = 14,137.92/x
  3. Step 3: Cross multiply
    18,843.20x = 25,988 × 14,137.92
  4. Step 4: Simplify right side
    18,843.20x = 367,416,264.96
  5. Step 5: Solve for x
    x = 367,416,264.96/18,843.20
  6. Step 6: Final answer
    x = 19,498.61

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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.