Home / 18,857.75-28,311.35-12,645.56

Finding the Fourth Proportional to 18,857.75, 28,311.35 and 12,645.56

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Solution

The fourth proportional to 18,857.75, 28,311.35 and 12,645.56 is: 18,984.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,857.75 : 28,311.35 = 12,645.56 : x
  2. Step 2: Convert to fraction form
    18,857.75/28,311.35 = 12,645.56/x
  3. Step 3: Cross multiply
    18,857.75x = 28,311.35 × 12,645.56
  4. Step 4: Simplify right side
    18,857.75x = 358,012,930.08
  5. Step 5: Solve for x
    x = 358,012,930.08/18,857.75
  6. Step 6: Final answer
    x = 18,984.92

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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.