Home / 20,655.96-28,505.16-11,224.56

Finding the Fourth Proportional to 20,655.96, 28,505.16 and 11,224.56

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Solution

The fourth proportional to 20,655.96, 28,505.16 and 11,224.56 is: 15,489.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,655.96 : 28,505.16 = 11,224.56 : x
  2. Step 2: Convert to fraction form
    20,655.96/28,505.16 = 11,224.56/x
  3. Step 3: Cross multiply
    20,655.96x = 28,505.16 × 11,224.56
  4. Step 4: Simplify right side
    20,655.96x = 319,957,878.73
  5. Step 5: Solve for x
    x = 319,957,878.73/20,655.96
  6. Step 6: Final answer
    x = 15,489.86

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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.