Home / 8,679.32-13,011.06-3,128.73

Finding the Fourth Proportional to 8,679.32, 13,011.06 and 3,128.73

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Solution

The fourth proportional to 8,679.32, 13,011.06 and 3,128.73 is: 4,690.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.32 : 13,011.06 = 3,128.73 : x
  2. Step 2: Convert to fraction form
    8,679.32/13,011.06 = 3,128.73/x
  3. Step 3: Cross multiply
    8,679.32x = 13,011.06 × 3,128.73
  4. Step 4: Simplify right side
    8,679.32x = 40,708,056.70
  5. Step 5: Solve for x
    x = 40,708,056.70/8,679.32
  6. Step 6: Final answer
    x = 4,690.24

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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.