Home / 21,815.65-30,103.82-12,255.02

Finding the Fourth Proportional to 21,815.65, 30,103.82 and 12,255.02

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Solution

The fourth proportional to 21,815.65, 30,103.82 and 12,255.02 is: 16,910.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,815.65 : 30,103.82 = 12,255.02 : x
  2. Step 2: Convert to fraction form
    21,815.65/30,103.82 = 12,255.02/x
  3. Step 3: Cross multiply
    21,815.65x = 30,103.82 × 12,255.02
  4. Step 4: Simplify right side
    21,815.65x = 368,922,871.55
  5. Step 5: Solve for x
    x = 368,922,871.55/21,815.65
  6. Step 6: Final answer
    x = 16,910.93

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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.