Home / 8,118.57-12,178.03-6,453.84

Finding the Fourth Proportional to 8,118.57, 12,178.03 and 6,453.84

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Solution

The fourth proportional to 8,118.57, 12,178.03 and 6,453.84 is: 9,680.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.57 : 12,178.03 = 6,453.84 : x
  2. Step 2: Convert to fraction form
    8,118.57/12,178.03 = 6,453.84/x
  3. Step 3: Cross multiply
    8,118.57x = 12,178.03 × 6,453.84
  4. Step 4: Simplify right side
    8,118.57x = 78,595,089.60
  5. Step 5: Solve for x
    x = 78,595,089.60/8,118.57
  6. Step 6: Final answer
    x = 9,680.91

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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.