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Finding the Fourth Proportional to 8,728.40, 12,058.80 and 8,028.56

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Solution

The fourth proportional to 8,728.40, 12,058.80 and 8,028.56 is: 11,091.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.40 : 12,058.80 = 8,028.56 : x
  2. Step 2: Convert to fraction form
    8,728.40/12,058.80 = 8,028.56/x
  3. Step 3: Cross multiply
    8,728.40x = 12,058.80 × 8,028.56
  4. Step 4: Simplify right side
    8,728.40x = 96,814,799.33
  5. Step 5: Solve for x
    x = 96,814,799.33/8,728.40
  6. Step 6: Final answer
    x = 11,091.93

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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.