Home / 15,837.43-21,857.96-9,121.75

Finding the Fourth Proportional to 15,837.43, 21,857.96 and 9,121.75

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Solution

The fourth proportional to 15,837.43, 21,857.96 and 9,121.75 is: 12,589.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,837.43 : 21,857.96 = 9,121.75 : x
  2. Step 2: Convert to fraction form
    15,837.43/21,857.96 = 9,121.75/x
  3. Step 3: Cross multiply
    15,837.43x = 21,857.96 × 9,121.75
  4. Step 4: Simplify right side
    15,837.43x = 199,382,846.63
  5. Step 5: Solve for x
    x = 199,382,846.63/15,837.43
  6. Step 6: Final answer
    x = 12,589.34

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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.