Home / 12,255-16,917.84-8,220.36

Finding the Fourth Proportional to 12,255, 16,917.84 and 8,220.36

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Solution

The fourth proportional to 12,255, 16,917.84 and 8,220.36 is: 11,348.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,255 : 16,917.84 = 8,220.36 : x
  2. Step 2: Convert to fraction form
    12,255/16,917.84 = 8,220.36/x
  3. Step 3: Cross multiply
    12,255x = 16,917.84 × 8,220.36
  4. Step 4: Simplify right side
    12,255x = 139,070,735.22
  5. Step 5: Solve for x
    x = 139,070,735.22/12,255
  6. Step 6: Final answer
    x = 11,348.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.