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Finding the Fourth Proportional to 7,149.85, 10,724.59 and 1,955.72

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Solution

The fourth proportional to 7,149.85, 10,724.59 and 1,955.72 is: 2,933.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149.85 : 10,724.59 = 1,955.72 : x
  2. Step 2: Convert to fraction form
    7,149.85/10,724.59 = 1,955.72/x
  3. Step 3: Cross multiply
    7,149.85x = 10,724.59 × 1,955.72
  4. Step 4: Simplify right side
    7,149.85x = 20,974,295.15
  5. Step 5: Solve for x
    x = 20,974,295.15/7,149.85
  6. Step 6: Final answer
    x = 2,933.53

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Similar ratio
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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.