Home / 8,311.12-12,457.76-4,142.88

Finding the Fourth Proportional to 8,311.12, 12,457.76 and 4,142.88

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Solution

The fourth proportional to 8,311.12, 12,457.76 and 4,142.88 is: 6,209.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,311.12 : 12,457.76 = 4,142.88 : x
  2. Step 2: Convert to fraction form
    8,311.12/12,457.76 = 4,142.88/x
  3. Step 3: Cross multiply
    8,311.12x = 12,457.76 × 4,142.88
  4. Step 4: Simplify right side
    8,311.12x = 51,611,004.75
  5. Step 5: Solve for x
    x = 51,611,004.75/8,311.12
  6. Step 6: Final answer
    x = 6,209.87

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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.