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Finding the Fourth Proportional to 5,771.38, 7,964.50 and 3,118.79

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Solution

The fourth proportional to 5,771.38, 7,964.50 and 3,118.79 is: 4,303.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,771.38 : 7,964.50 = 3,118.79 : x
  2. Step 2: Convert to fraction form
    5,771.38/7,964.50 = 3,118.79/x
  3. Step 3: Cross multiply
    5,771.38x = 7,964.50 × 3,118.79
  4. Step 4: Simplify right side
    5,771.38x = 24,839,602.96
  5. Step 5: Solve for x
    x = 24,839,602.96/5,771.38
  6. Step 6: Final answer
    x = 4,303.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.