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Finding the Fourth Proportional to 12,578.55, 18,870.24 and 4,786.74

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Solution

The fourth proportional to 12,578.55, 18,870.24 and 4,786.74 is: 7,181.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.55 : 18,870.24 = 4,786.74 : x
  2. Step 2: Convert to fraction form
    12,578.55/18,870.24 = 4,786.74/x
  3. Step 3: Cross multiply
    12,578.55x = 18,870.24 × 4,786.74
  4. Step 4: Simplify right side
    12,578.55x = 90,326,932.62
  5. Step 5: Solve for x
    x = 90,326,932.62/12,578.55
  6. Step 6: Final answer
    x = 7,181.03

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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.