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Finding the Fourth Proportional to 18,453.84, 27,686.16 and 7,918.32

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Solution

The fourth proportional to 18,453.84, 27,686.16 and 7,918.32 is: 11,879.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,453.84 : 27,686.16 = 7,918.32 : x
  2. Step 2: Convert to fraction form
    18,453.84/27,686.16 = 7,918.32/x
  3. Step 3: Cross multiply
    18,453.84x = 27,686.16 × 7,918.32
  4. Step 4: Simplify right side
    18,453.84x = 219,227,874.45
  5. Step 5: Solve for x
    x = 219,227,874.45/18,453.84
  6. Step 6: Final answer
    x = 11,879.80

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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.