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Finding the Fourth Proportional to 8,571.29, 12,856.10 and 5,815.67

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Solution

The fourth proportional to 8,571.29, 12,856.10 and 5,815.67 is: 8,722.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.29 : 12,856.10 = 5,815.67 : x
  2. Step 2: Convert to fraction form
    8,571.29/12,856.10 = 5,815.67/x
  3. Step 3: Cross multiply
    8,571.29x = 12,856.10 × 5,815.67
  4. Step 4: Simplify right side
    8,571.29x = 74,766,741.73
  5. Step 5: Solve for x
    x = 74,766,741.73/8,571.29
  6. Step 6: Final answer
    x = 8,722.93

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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.