Home / 12,212.16-18,319.57-3,890.22

Finding the Fourth Proportional to 12,212.16, 18,319.57 and 3,890.22

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Solution

The fourth proportional to 12,212.16, 18,319.57 and 3,890.22 is: 5,835.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,212.16 : 18,319.57 = 3,890.22 : x
  2. Step 2: Convert to fraction form
    12,212.16/18,319.57 = 3,890.22/x
  3. Step 3: Cross multiply
    12,212.16x = 18,319.57 × 3,890.22
  4. Step 4: Simplify right side
    12,212.16x = 71,267,157.61
  5. Step 5: Solve for x
    x = 71,267,157.61/12,212.16
  6. Step 6: Final answer
    x = 5,835.75

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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.