Home / 12,190.32-18,288.21-3,870.60

Finding the Fourth Proportional to 12,190.32, 18,288.21 and 3,870.60

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Solution

The fourth proportional to 12,190.32, 18,288.21 and 3,870.60 is: 5,806.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.32 : 18,288.21 = 3,870.60 : x
  2. Step 2: Convert to fraction form
    12,190.32/18,288.21 = 3,870.60/x
  3. Step 3: Cross multiply
    12,190.32x = 18,288.21 × 3,870.60
  4. Step 4: Simplify right side
    12,190.32x = 70,786,345.63
  5. Step 5: Solve for x
    x = 70,786,345.63/12,190.32
  6. Step 6: Final answer
    x = 5,806.77

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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.