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Finding the Fourth Proportional to 18,258.44, 27,377.88 and 12,421.64

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Solution

The fourth proportional to 18,258.44, 27,377.88 and 12,421.64 is: 18,625.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,258.44 : 27,377.88 = 12,421.64 : x
  2. Step 2: Convert to fraction form
    18,258.44/27,377.88 = 12,421.64/x
  3. Step 3: Cross multiply
    18,258.44x = 27,377.88 × 12,421.64
  4. Step 4: Simplify right side
    18,258.44x = 340,078,169.32
  5. Step 5: Solve for x
    x = 340,078,169.32/18,258.44
  6. Step 6: Final answer
    x = 18,625.81

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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.