Home / 12,883.09-17,778.43-7,217.78

Finding the Fourth Proportional to 12,883.09, 17,778.43 and 7,217.78

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Solution

The fourth proportional to 12,883.09, 17,778.43 and 7,217.78 is: 9,960.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,883.09 : 17,778.43 = 7,217.78 : x
  2. Step 2: Convert to fraction form
    12,883.09/17,778.43 = 7,217.78/x
  3. Step 3: Cross multiply
    12,883.09x = 17,778.43 × 7,217.78
  4. Step 4: Simplify right side
    12,883.09x = 128,320,796.49
  5. Step 5: Solve for x
    x = 128,320,796.49/12,883.09
  6. Step 6: Final answer
    x = 9,960.41

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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.