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Finding the Fourth Proportional to 8,861.58, 13,187.77 and 8,566.29

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Solution

The fourth proportional to 8,861.58, 13,187.77 and 8,566.29 is: 12,748.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861.58 : 13,187.77 = 8,566.29 : x
  2. Step 2: Convert to fraction form
    8,861.58/13,187.77 = 8,566.29/x
  3. Step 3: Cross multiply
    8,861.58x = 13,187.77 × 8,566.29
  4. Step 4: Simplify right side
    8,861.58x = 112,970,240.86
  5. Step 5: Solve for x
    x = 112,970,240.86/8,861.58
  6. Step 6: Final answer
    x = 12,748.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.