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Finding the Fourth Proportional to 8,607.81, 12,879.09 and 5,099.70

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Solution

The fourth proportional to 8,607.81, 12,879.09 and 5,099.70 is: 7,630.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.81 : 12,879.09 = 5,099.70 : x
  2. Step 2: Convert to fraction form
    8,607.81/12,879.09 = 5,099.70/x
  3. Step 3: Cross multiply
    8,607.81x = 12,879.09 × 5,099.70
  4. Step 4: Simplify right side
    8,607.81x = 65,679,495.27
  5. Step 5: Solve for x
    x = 65,679,495.27/8,607.81
  6. Step 6: Final answer
    x = 7,630.22

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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.