Home / 12,212.63-18,290.46-8,917.55

Finding the Fourth Proportional to 12,212.63, 18,290.46 and 8,917.55

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Solution

The fourth proportional to 12,212.63, 18,290.46 and 8,917.55 is: 13,355.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,212.63 : 18,290.46 = 8,917.55 : x
  2. Step 2: Convert to fraction form
    12,212.63/18,290.46 = 8,917.55/x
  3. Step 3: Cross multiply
    12,212.63x = 18,290.46 × 8,917.55
  4. Step 4: Simplify right side
    12,212.63x = 163,106,091.57
  5. Step 5: Solve for x
    x = 163,106,091.57/12,212.63
  6. Step 6: Final answer
    x = 13,355.53

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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.