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Finding the Fourth Proportional to 7,759.66, 11,639.58 and 3,316.72

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Solution

The fourth proportional to 7,759.66, 11,639.58 and 3,316.72 is: 4,975.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,759.66 : 11,639.58 = 3,316.72 : x
  2. Step 2: Convert to fraction form
    7,759.66/11,639.58 = 3,316.72/x
  3. Step 3: Cross multiply
    7,759.66x = 11,639.58 × 3,316.72
  4. Step 4: Simplify right side
    7,759.66x = 38,605,227.78
  5. Step 5: Solve for x
    x = 38,605,227.78/7,759.66
  6. Step 6: Final answer
    x = 4,975.12

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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.