Home / 12,613.47-18,919.50-3,847.70

Finding the Fourth Proportional to 12,613.47, 18,919.50 and 3,847.70

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Solution

The fourth proportional to 12,613.47, 18,919.50 and 3,847.70 is: 5,771.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,613.47 : 18,919.50 = 3,847.70 : x
  2. Step 2: Convert to fraction form
    12,613.47/18,919.50 = 3,847.70/x
  3. Step 3: Cross multiply
    12,613.47x = 18,919.50 × 3,847.70
  4. Step 4: Simplify right side
    12,613.47x = 72,796,560.15
  5. Step 5: Solve for x
    x = 72,796,560.15/12,613.47
  6. Step 6: Final answer
    x = 5,771.33

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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.