Home / 12,578.64-18,867.76-3,218.58

Finding the Fourth Proportional to 12,578.64, 18,867.76 and 3,218.58

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Solution

The fourth proportional to 12,578.64, 18,867.76 and 3,218.58 is: 4,827.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.64 : 18,867.76 = 3,218.58 : x
  2. Step 2: Convert to fraction form
    12,578.64/18,867.76 = 3,218.58/x
  3. Step 3: Cross multiply
    12,578.64x = 18,867.76 × 3,218.58
  4. Step 4: Simplify right side
    12,578.64x = 60,727,394.98
  5. Step 5: Solve for x
    x = 60,727,394.98/12,578.64
  6. Step 6: Final answer
    x = 4,827.82

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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.