Home / 30,369.86-41,961.80-21,855.14

Finding the Fourth Proportional to 30,369.86, 41,961.80 and 21,855.14

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Solution

The fourth proportional to 30,369.86, 41,961.80 and 21,855.14 is: 30,197.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,369.86 : 41,961.80 = 21,855.14 : x
  2. Step 2: Convert to fraction form
    30,369.86/41,961.80 = 21,855.14/x
  3. Step 3: Cross multiply
    30,369.86x = 41,961.80 × 21,855.14
  4. Step 4: Simplify right side
    30,369.86x = 917,080,694.57
  5. Step 5: Solve for x
    x = 917,080,694.57/30,369.86
  6. Step 6: Final answer
    x = 30,197.07

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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.