Home / 12,355.44-18,539.82-8,978.60

Finding the Fourth Proportional to 12,355.44, 18,539.82 and 8,978.60

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Solution

The fourth proportional to 12,355.44, 18,539.82 and 8,978.60 is: 13,472.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,355.44 : 18,539.82 = 8,978.60 : x
  2. Step 2: Convert to fraction form
    12,355.44/18,539.82 = 8,978.60/x
  3. Step 3: Cross multiply
    12,355.44x = 18,539.82 × 8,978.60
  4. Step 4: Simplify right side
    12,355.44x = 166,461,627.85
  5. Step 5: Solve for x
    x = 166,461,627.85/12,355.44
  6. Step 6: Final answer
    x = 13,472.74

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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.