Home / 8,215.28-12,311.56-7,116.92

Finding the Fourth Proportional to 8,215.28, 12,311.56 and 7,116.92

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Solution

The fourth proportional to 8,215.28, 12,311.56 and 7,116.92 is: 10,665.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,215.28 : 12,311.56 = 7,116.92 : x
  2. Step 2: Convert to fraction form
    8,215.28/12,311.56 = 7,116.92/x
  3. Step 3: Cross multiply
    8,215.28x = 12,311.56 × 7,116.92
  4. Step 4: Simplify right side
    8,215.28x = 87,620,387.60
  5. Step 5: Solve for x
    x = 87,620,387.60/8,215.28
  6. Step 6: Final answer
    x = 10,665.54

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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.