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Finding the Fourth Proportional to 7,809.06, 11,715.16 and 2,878.73

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Solution

The fourth proportional to 7,809.06, 11,715.16 and 2,878.73 is: 4,318.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,809.06 : 11,715.16 = 2,878.73 : x
  2. Step 2: Convert to fraction form
    7,809.06/11,715.16 = 2,878.73/x
  3. Step 3: Cross multiply
    7,809.06x = 11,715.16 × 2,878.73
  4. Step 4: Simplify right side
    7,809.06x = 33,724,716.77
  5. Step 5: Solve for x
    x = 33,724,716.77/7,809.06
  6. Step 6: Final answer
    x = 4,318.67

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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.