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Finding the Fourth Proportional to 6,964.79, 9,611.61 and 3,980.75

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Solution

The fourth proportional to 6,964.79, 9,611.61 and 3,980.75 is: 5,493.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,964.79 : 9,611.61 = 3,980.75 : x
  2. Step 2: Convert to fraction form
    6,964.79/9,611.61 = 3,980.75/x
  3. Step 3: Cross multiply
    6,964.79x = 9,611.61 × 3,980.75
  4. Step 4: Simplify right side
    6,964.79x = 38,261,416.51
  5. Step 5: Solve for x
    x = 38,261,416.51/6,964.79
  6. Step 6: Final answer
    x = 5,493.55

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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.