Home / 12,618.64-18,930.91-3,853.55

Finding the Fourth Proportional to 12,618.64, 18,930.91 and 3,853.55

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Solution

The fourth proportional to 12,618.64, 18,930.91 and 3,853.55 is: 5,781.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.64 : 18,930.91 = 3,853.55 : x
  2. Step 2: Convert to fraction form
    12,618.64/18,930.91 = 3,853.55/x
  3. Step 3: Cross multiply
    12,618.64x = 18,930.91 × 3,853.55
  4. Step 4: Simplify right side
    12,618.64x = 72,951,208.23
  5. Step 5: Solve for x
    x = 72,951,208.23/12,618.64
  6. Step 6: Final answer
    x = 5,781.23

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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.