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Finding the Fourth Proportional to 30,986.88, 46,480.85 and 12,518.88

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Solution

The fourth proportional to 30,986.88, 46,480.85 and 12,518.88 is: 18,778.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,986.88 : 46,480.85 = 12,518.88 : x
  2. Step 2: Convert to fraction form
    30,986.88/46,480.85 = 12,518.88/x
  3. Step 3: Cross multiply
    30,986.88x = 46,480.85 × 12,518.88
  4. Step 4: Simplify right side
    30,986.88x = 581,888,183.45
  5. Step 5: Solve for x
    x = 581,888,183.45/30,986.88
  6. Step 6: Final answer
    x = 18,778.53

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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.