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Finding the Fourth Proportional to 8,586.64, 12,879.96 and 4,688.92

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Solution

The fourth proportional to 8,586.64, 12,879.96 and 4,688.92 is: 7,033.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,586.64 : 12,879.96 = 4,688.92 : x
  2. Step 2: Convert to fraction form
    8,586.64/12,879.96 = 4,688.92/x
  3. Step 3: Cross multiply
    8,586.64x = 12,879.96 × 4,688.92
  4. Step 4: Simplify right side
    8,586.64x = 60,393,102.04
  5. Step 5: Solve for x
    x = 60,393,102.04/8,586.64
  6. Step 6: Final answer
    x = 7,033.38

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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.