Home / 21,839.88-30,136.95-12,767.37

Finding the Fourth Proportional to 21,839.88, 30,136.95 and 12,767.37

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Solution

The fourth proportional to 21,839.88, 30,136.95 and 12,767.37 is: 17,617.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,839.88 : 30,136.95 = 12,767.37 : x
  2. Step 2: Convert to fraction form
    21,839.88/30,136.95 = 12,767.37/x
  3. Step 3: Cross multiply
    21,839.88x = 30,136.95 × 12,767.37
  4. Step 4: Simplify right side
    21,839.88x = 384,769,591.32
  5. Step 5: Solve for x
    x = 384,769,591.32/21,839.88
  6. Step 6: Final answer
    x = 17,617.75

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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.