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Finding the Fourth Proportional to 12,618.58, 18,928.14 and 3,258.79

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Solution

The fourth proportional to 12,618.58, 18,928.14 and 3,258.79 is: 4,888.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.58 : 18,928.14 = 3,258.79 : x
  2. Step 2: Convert to fraction form
    12,618.58/18,928.14 = 3,258.79/x
  3. Step 3: Cross multiply
    12,618.58x = 18,928.14 × 3,258.79
  4. Step 4: Simplify right side
    12,618.58x = 61,682,833.35
  5. Step 5: Solve for x
    x = 61,682,833.35/12,618.58
  6. Step 6: Final answer
    x = 4,888.25

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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.