Home / 12,231.40-16,878.18-8,458.60

Finding the Fourth Proportional to 12,231.40, 16,878.18 and 8,458.60

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Solution

The fourth proportional to 12,231.40, 16,878.18 and 8,458.60 is: 11,672.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,231.40 : 16,878.18 = 8,458.60 : x
  2. Step 2: Convert to fraction form
    12,231.40/16,878.18 = 8,458.60/x
  3. Step 3: Cross multiply
    12,231.40x = 16,878.18 × 8,458.60
  4. Step 4: Simplify right side
    12,231.40x = 142,765,773.35
  5. Step 5: Solve for x
    x = 142,765,773.35/12,231.40
  6. Step 6: Final answer
    x = 11,672.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.