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Finding the Fourth Proportional to 20,894.44, 28,835.05 and 14,940.34

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Solution

The fourth proportional to 20,894.44, 28,835.05 and 14,940.34 is: 20,618.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,894.44 : 28,835.05 = 14,940.34 : x
  2. Step 2: Convert to fraction form
    20,894.44/28,835.05 = 14,940.34/x
  3. Step 3: Cross multiply
    20,894.44x = 28,835.05 × 14,940.34
  4. Step 4: Simplify right side
    20,894.44x = 430,805,450.92
  5. Step 5: Solve for x
    x = 430,805,450.92/20,894.44
  6. Step 6: Final answer
    x = 20,618.19

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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.