Home / 21,835.44-30,136.50-12,885.12

Finding the Fourth Proportional to 21,835.44, 30,136.50 and 12,885.12

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Solution

The fourth proportional to 21,835.44, 30,136.50 and 12,885.12 is: 17,783.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,835.44 : 30,136.50 = 12,885.12 : x
  2. Step 2: Convert to fraction form
    21,835.44/30,136.50 = 12,885.12/x
  3. Step 3: Cross multiply
    21,835.44x = 30,136.50 × 12,885.12
  4. Step 4: Simplify right side
    21,835.44x = 388,312,418.88
  5. Step 5: Solve for x
    x = 388,312,418.88/21,835.44
  6. Step 6: Final answer
    x = 17,783.59

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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.