Home / 8,153.20-12,215.40-7,231.60

Finding the Fourth Proportional to 8,153.20, 12,215.40 and 7,231.60

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Solution

The fourth proportional to 8,153.20, 12,215.40 and 7,231.60 is: 10,834.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,153.20 : 12,215.40 = 7,231.60 : x
  2. Step 2: Convert to fraction form
    8,153.20/12,215.40 = 7,231.60/x
  3. Step 3: Cross multiply
    8,153.20x = 12,215.40 × 7,231.60
  4. Step 4: Simplify right side
    8,153.20x = 88,336,886.64
  5. Step 5: Solve for x
    x = 88,336,886.64/8,153.20
  6. Step 6: Final answer
    x = 10,834.63

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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.