Home / 18,431.34-25,415.55-12,132.78

Finding the Fourth Proportional to 18,431.34, 25,415.55 and 12,132.78

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Solution

The fourth proportional to 18,431.34, 25,415.55 and 12,132.78 is: 16,730.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,431.34 : 25,415.55 = 12,132.78 : x
  2. Step 2: Convert to fraction form
    18,431.34/25,415.55 = 12,132.78/x
  3. Step 3: Cross multiply
    18,431.34x = 25,415.55 × 12,132.78
  4. Step 4: Simplify right side
    18,431.34x = 308,361,276.73
  5. Step 5: Solve for x
    x = 308,361,276.73/18,431.34
  6. Step 6: Final answer
    x = 16,730.27

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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.