Home / 12,190.56-18,288.59-3,870.86

Finding the Fourth Proportional to 12,190.56, 18,288.59 and 3,870.86

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Solution

The fourth proportional to 12,190.56, 18,288.59 and 3,870.86 is: 5,807.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.56 : 18,288.59 = 3,870.86 : x
  2. Step 2: Convert to fraction form
    12,190.56/18,288.59 = 3,870.86/x
  3. Step 3: Cross multiply
    12,190.56x = 18,288.59 × 3,870.86
  4. Step 4: Simplify right side
    12,190.56x = 70,792,460.69
  5. Step 5: Solve for x
    x = 70,792,460.69/12,190.56
  6. Step 6: Final answer
    x = 5,807.15

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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.