Home / 21,839.88-30,137.76-12,408.24

Finding the Fourth Proportional to 21,839.88, 30,137.76 and 12,408.24

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Solution

The fourth proportional to 21,839.88, 30,137.76 and 12,408.24 is: 17,122.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,839.88 : 30,137.76 = 12,408.24 : x
  2. Step 2: Convert to fraction form
    21,839.88/30,137.76 = 12,408.24/x
  3. Step 3: Cross multiply
    21,839.88x = 30,137.76 × 12,408.24
  4. Step 4: Simplify right side
    21,839.88x = 373,956,559.14
  5. Step 5: Solve for x
    x = 373,956,559.14/21,839.88
  6. Step 6: Final answer
    x = 17,122.65

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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.