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Finding the Fourth Proportional to 18,128.10, 27,193.44 and 7,587.51

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Solution

The fourth proportional to 18,128.10, 27,193.44 and 7,587.51 is: 11,381.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,128.10 : 27,193.44 = 7,587.51 : x
  2. Step 2: Convert to fraction form
    18,128.10/27,193.44 = 7,587.51/x
  3. Step 3: Cross multiply
    18,128.10x = 27,193.44 × 7,587.51
  4. Step 4: Simplify right side
    18,128.10x = 206,330,381.73
  5. Step 5: Solve for x
    x = 206,330,381.73/18,128.10
  6. Step 6: Final answer
    x = 11,381.80

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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.