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Finding the Fourth Proportional to 7,861.95, 11,798.39 and 5,081.72

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Solution

The fourth proportional to 7,861.95, 11,798.39 and 5,081.72 is: 7,626.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,861.95 : 11,798.39 = 5,081.72 : x
  2. Step 2: Convert to fraction form
    7,861.95/11,798.39 = 5,081.72/x
  3. Step 3: Cross multiply
    7,861.95x = 11,798.39 × 5,081.72
  4. Step 4: Simplify right side
    7,861.95x = 59,956,030.03
  5. Step 5: Solve for x
    x = 59,956,030.03/7,861.95
  6. Step 6: Final answer
    x = 7,626.10

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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.