Home / 12,120.87-18,181.53-3,800.70

Finding the Fourth Proportional to 12,120.87, 18,181.53 and 3,800.70

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Solution

The fourth proportional to 12,120.87, 18,181.53 and 3,800.70 is: 5,701.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.87 : 18,181.53 = 3,800.70 : x
  2. Step 2: Convert to fraction form
    12,120.87/18,181.53 = 3,800.70/x
  3. Step 3: Cross multiply
    12,120.87x = 18,181.53 × 3,800.70
  4. Step 4: Simplify right side
    12,120.87x = 69,102,541.07
  5. Step 5: Solve for x
    x = 69,102,541.07/12,120.87
  6. Step 6: Final answer
    x = 5,701.12

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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.