Home / 12,281.25-18,421.47-3,961.74

Finding the Fourth Proportional to 12,281.25, 18,421.47 and 3,961.74

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Solution

The fourth proportional to 12,281.25, 18,421.47 and 3,961.74 is: 5,942.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,281.25 : 18,421.47 = 3,961.74 : x
  2. Step 2: Convert to fraction form
    12,281.25/18,421.47 = 3,961.74/x
  3. Step 3: Cross multiply
    12,281.25x = 18,421.47 × 3,961.74
  4. Step 4: Simplify right side
    12,281.25x = 72,981,074.56
  5. Step 5: Solve for x
    x = 72,981,074.56/12,281.25
  6. Step 6: Final answer
    x = 5,942.48

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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.