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Finding the Fourth Proportional to 12,578.59, 18,867.93 and 4,258.68

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Solution

The fourth proportional to 12,578.59, 18,867.93 and 4,258.68 is: 6,388.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.59 : 18,867.93 = 4,258.68 : x
  2. Step 2: Convert to fraction form
    12,578.59/18,867.93 = 4,258.68/x
  3. Step 3: Cross multiply
    12,578.59x = 18,867.93 × 4,258.68
  4. Step 4: Simplify right side
    12,578.59x = 80,352,476.13
  5. Step 5: Solve for x
    x = 80,352,476.13/12,578.59
  6. Step 6: Final answer
    x = 6,388.04

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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.