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Finding the Fourth Proportional to 19,313.82, 28,963.44 and 8,918.28

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Solution

The fourth proportional to 19,313.82, 28,963.44 and 8,918.28 is: 13,374.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,313.82 : 28,963.44 = 8,918.28 : x
  2. Step 2: Convert to fraction form
    19,313.82/28,963.44 = 8,918.28/x
  3. Step 3: Cross multiply
    19,313.82x = 28,963.44 × 8,918.28
  4. Step 4: Simplify right side
    19,313.82x = 258,304,067.68
  5. Step 5: Solve for x
    x = 258,304,067.68/19,313.82
  6. Step 6: Final answer
    x = 13,374.05

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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.