Home / 20,644.21-28,489.16-11,212.78

Finding the Fourth Proportional to 20,644.21, 28,489.16 and 11,212.78

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Solution

The fourth proportional to 20,644.21, 28,489.16 and 11,212.78 is: 15,473.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.21 : 28,489.16 = 11,212.78 : x
  2. Step 2: Convert to fraction form
    20,644.21/28,489.16 = 11,212.78/x
  3. Step 3: Cross multiply
    20,644.21x = 28,489.16 × 11,212.78
  4. Step 4: Simplify right side
    20,644.21x = 319,442,541.02
  5. Step 5: Solve for x
    x = 319,442,541.02/20,644.21
  6. Step 6: Final answer
    x = 15,473.71

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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.