Home / 21,979.16-30,331.26-12,043.16

Finding the Fourth Proportional to 21,979.16, 30,331.26 and 12,043.16

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Solution

The fourth proportional to 21,979.16, 30,331.26 and 12,043.16 is: 16,619.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.16 : 30,331.26 = 12,043.16 : x
  2. Step 2: Convert to fraction form
    21,979.16/30,331.26 = 12,043.16/x
  3. Step 3: Cross multiply
    21,979.16x = 30,331.26 × 12,043.16
  4. Step 4: Simplify right side
    21,979.16x = 365,284,217.18
  5. Step 5: Solve for x
    x = 365,284,217.18/21,979.16
  6. Step 6: Final answer
    x = 16,619.57

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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.