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Finding the Fourth Proportional to 8,585.67, 12,861.63 and 5,655.09

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Solution

The fourth proportional to 8,585.67, 12,861.63 and 5,655.09 is: 8,471.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,585.67 : 12,861.63 = 5,655.09 : x
  2. Step 2: Convert to fraction form
    8,585.67/12,861.63 = 5,655.09/x
  3. Step 3: Cross multiply
    8,585.67x = 12,861.63 × 5,655.09
  4. Step 4: Simplify right side
    8,585.67x = 72,733,675.20
  5. Step 5: Solve for x
    x = 72,733,675.20/8,585.67
  6. Step 6: Final answer
    x = 8,471.52

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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.