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Finding the Fourth Proportional to 18,698.41, 25,797.21 and 11,987.74

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Solution

The fourth proportional to 18,698.41, 25,797.21 and 11,987.74 is: 16,538.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.41 : 25,797.21 = 11,987.74 : x
  2. Step 2: Convert to fraction form
    18,698.41/25,797.21 = 11,987.74/x
  3. Step 3: Cross multiply
    18,698.41x = 25,797.21 × 11,987.74
  4. Step 4: Simplify right side
    18,698.41x = 309,250,246.21
  5. Step 5: Solve for x
    x = 309,250,246.21/18,698.41
  6. Step 6: Final answer
    x = 16,538.85

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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.