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Finding the Fourth Proportional to 8,861.96, 13,188.33 and 8,566.67

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Solution

The fourth proportional to 8,861.96, 13,188.33 and 8,566.67 is: 12,748.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861.96 : 13,188.33 = 8,566.67 : x
  2. Step 2: Convert to fraction form
    8,861.96/13,188.33 = 8,566.67/x
  3. Step 3: Cross multiply
    8,861.96x = 13,188.33 × 8,566.67
  4. Step 4: Simplify right side
    8,861.96x = 112,980,005.02
  5. Step 5: Solve for x
    x = 112,980,005.02/8,861.96
  6. Step 6: Final answer
    x = 12,748.88

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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.