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Finding the Fourth Proportional to 8,861.85, 13,243.81 and 8,349.72

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Solution

The fourth proportional to 8,861.85, 13,243.81 and 8,349.72 is: 12,478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861.85 : 13,243.81 = 8,349.72 : x
  2. Step 2: Convert to fraction form
    8,861.85/13,243.81 = 8,349.72/x
  3. Step 3: Cross multiply
    8,861.85x = 13,243.81 × 8,349.72
  4. Step 4: Simplify right side
    8,861.85x = 110,582,134.02
  5. Step 5: Solve for x
    x = 110,582,134.02/8,861.85
  6. Step 6: Final answer
    x = 12,478.45

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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.