Home / 21,837.26-30,131.79-12,402.38

Finding the Fourth Proportional to 21,837.26, 30,131.79 and 12,402.38

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Solution

The fourth proportional to 21,837.26, 30,131.79 and 12,402.38 is: 17,113.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,837.26 : 30,131.79 = 12,402.38 : x
  2. Step 2: Convert to fraction form
    21,837.26/30,131.79 = 12,402.38/x
  3. Step 3: Cross multiply
    21,837.26x = 30,131.79 × 12,402.38
  4. Step 4: Simplify right side
    21,837.26x = 373,705,909.66
  5. Step 5: Solve for x
    x = 373,705,909.66/21,837.26
  6. Step 6: Final answer
    x = 17,113.22

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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.