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Finding the Fourth Proportional to 5,138.65, 7,695.55 and 2,940.71

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Solution

The fourth proportional to 5,138.65, 7,695.55 and 2,940.71 is: 4,403.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,138.65 : 7,695.55 = 2,940.71 : x
  2. Step 2: Convert to fraction form
    5,138.65/7,695.55 = 2,940.71/x
  3. Step 3: Cross multiply
    5,138.65x = 7,695.55 × 2,940.71
  4. Step 4: Simplify right side
    5,138.65x = 22,630,392.73
  5. Step 5: Solve for x
    x = 22,630,392.73/5,138.65
  6. Step 6: Final answer
    x = 4,403.96

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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.