Home / 20,895.12-28,835.94-11,940.72

Finding the Fourth Proportional to 20,895.12, 28,835.94 and 11,940.72

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Solution

The fourth proportional to 20,895.12, 28,835.94 and 11,940.72 is: 16,478.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,895.12 : 28,835.94 = 11,940.72 : x
  2. Step 2: Convert to fraction form
    20,895.12/28,835.94 = 11,940.72/x
  3. Step 3: Cross multiply
    20,895.12x = 28,835.94 × 11,940.72
  4. Step 4: Simplify right side
    20,895.12x = 344,321,885.48
  5. Step 5: Solve for x
    x = 344,321,885.48/20,895.12
  6. Step 6: Final answer
    x = 16,478.58

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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.