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Finding the Fourth Proportional to 20,954.50, 28,917.21 and 12,573.70

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Solution

The fourth proportional to 20,954.50, 28,917.21 and 12,573.70 is: 17,351.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.50 : 28,917.21 = 12,573.70 : x
  2. Step 2: Convert to fraction form
    20,954.50/28,917.21 = 12,573.70/x
  3. Step 3: Cross multiply
    20,954.50x = 28,917.21 × 12,573.70
  4. Step 4: Simplify right side
    20,954.50x = 363,596,323.38
  5. Step 5: Solve for x
    x = 363,596,323.38/20,954.50
  6. Step 6: Final answer
    x = 17,351.71

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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.