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Finding the Fourth Proportional to 6,639.09, 9,958.91 and 1,959.10

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Solution

The fourth proportional to 6,639.09, 9,958.91 and 1,959.10 is: 2,938.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.09 : 9,958.91 = 1,959.10 : x
  2. Step 2: Convert to fraction form
    6,639.09/9,958.91 = 1,959.10/x
  3. Step 3: Cross multiply
    6,639.09x = 9,958.91 × 1,959.10
  4. Step 4: Simplify right side
    6,639.09x = 19,510,526.60
  5. Step 5: Solve for x
    x = 19,510,526.60/6,639.09
  6. Step 6: Final answer
    x = 2,938.73

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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.