Home / 12,126.76-18,190.06-3,120.86

Finding the Fourth Proportional to 12,126.76, 18,190.06 and 3,120.86

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Solution

The fourth proportional to 12,126.76, 18,190.06 and 3,120.86 is: 4,681.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,126.76 : 18,190.06 = 3,120.86 : x
  2. Step 2: Convert to fraction form
    12,126.76/18,190.06 = 3,120.86/x
  3. Step 3: Cross multiply
    12,126.76x = 18,190.06 × 3,120.86
  4. Step 4: Simplify right side
    12,126.76x = 56,768,630.65
  5. Step 5: Solve for x
    x = 56,768,630.65/12,126.76
  6. Step 6: Final answer
    x = 4,681.27

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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.