Home / 20,917.70-28,892.16-15,636.10

Finding the Fourth Proportional to 20,917.70, 28,892.16 and 15,636.10

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Solution

The fourth proportional to 20,917.70, 28,892.16 and 15,636.10 is: 21,597.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.70 : 28,892.16 = 15,636.10 : x
  2. Step 2: Convert to fraction form
    20,917.70/28,892.16 = 15,636.10/x
  3. Step 3: Cross multiply
    20,917.70x = 28,892.16 × 15,636.10
  4. Step 4: Simplify right side
    20,917.70x = 451,760,480.33
  5. Step 5: Solve for x
    x = 451,760,480.33/20,917.70
  6. Step 6: Final answer
    x = 21,597.04

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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.