Home / 21,979.21-30,336.74-12,553.24

Finding the Fourth Proportional to 21,979.21, 30,336.74 and 12,553.24

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Solution

The fourth proportional to 21,979.21, 30,336.74 and 12,553.24 is: 17,326.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.21 : 30,336.74 = 12,553.24 : x
  2. Step 2: Convert to fraction form
    21,979.21/30,336.74 = 12,553.24/x
  3. Step 3: Cross multiply
    21,979.21x = 30,336.74 × 12,553.24
  4. Step 4: Simplify right side
    21,979.21x = 380,824,378.04
  5. Step 5: Solve for x
    x = 380,824,378.04/21,979.21
  6. Step 6: Final answer
    x = 17,326.57

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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.