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Finding the Fourth Proportional to 30,425.95, 41,987.81 and 16,997.21

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Solution

The fourth proportional to 30,425.95, 41,987.81 and 16,997.21 is: 23,456.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,425.95 : 41,987.81 = 16,997.21 : x
  2. Step 2: Convert to fraction form
    30,425.95/41,987.81 = 16,997.21/x
  3. Step 3: Cross multiply
    30,425.95x = 41,987.81 × 16,997.21
  4. Step 4: Simplify right side
    30,425.95x = 713,675,329.09
  5. Step 5: Solve for x
    x = 713,675,329.09/30,425.95
  6. Step 6: Final answer
    x = 23,456.14

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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.