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Finding the Fourth Proportional to 7,861.05, 10,854.81 and 7,020.27

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Solution

The fourth proportional to 7,861.05, 10,854.81 and 7,020.27 is: 9,693.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,861.05 : 10,854.81 = 7,020.27 : x
  2. Step 2: Convert to fraction form
    7,861.05/10,854.81 = 7,020.27/x
  3. Step 3: Cross multiply
    7,861.05x = 10,854.81 × 7,020.27
  4. Step 4: Simplify right side
    7,861.05x = 76,203,697.00
  5. Step 5: Solve for x
    x = 76,203,697.00/7,861.05
  6. Step 6: Final answer
    x = 9,693.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.