Home / 8,156.08-12,221.34-6,311.80

Finding the Fourth Proportional to 8,156.08, 12,221.34 and 6,311.80

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Solution

The fourth proportional to 8,156.08, 12,221.34 and 6,311.80 is: 9,457.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,156.08 : 12,221.34 = 6,311.80 : x
  2. Step 2: Convert to fraction form
    8,156.08/12,221.34 = 6,311.80/x
  3. Step 3: Cross multiply
    8,156.08x = 12,221.34 × 6,311.80
  4. Step 4: Simplify right side
    8,156.08x = 77,138,653.81
  5. Step 5: Solve for x
    x = 77,138,653.81/8,156.08
  6. Step 6: Final answer
    x = 9,457.81

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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.