Home / 21,933.54-30,255.84-12,979.62

Finding the Fourth Proportional to 21,933.54, 30,255.84 and 12,979.62

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Solution

The fourth proportional to 21,933.54, 30,255.84 and 12,979.62 is: 17,904.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,933.54 : 30,255.84 = 12,979.62 : x
  2. Step 2: Convert to fraction form
    21,933.54/30,255.84 = 12,979.62/x
  3. Step 3: Cross multiply
    21,933.54x = 30,255.84 × 12,979.62
  4. Step 4: Simplify right side
    21,933.54x = 392,709,305.98
  5. Step 5: Solve for x
    x = 392,709,305.98/21,933.54
  6. Step 6: Final answer
    x = 17,904.51

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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.