Home / 20,505.35-28,298.33-11,431.31

Finding the Fourth Proportional to 20,505.35, 28,298.33 and 11,431.31

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Solution

The fourth proportional to 20,505.35, 28,298.33 and 11,431.31 is: 15,775.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.35 : 28,298.33 = 11,431.31 : x
  2. Step 2: Convert to fraction form
    20,505.35/28,298.33 = 11,431.31/x
  3. Step 3: Cross multiply
    20,505.35x = 28,298.33 × 11,431.31
  4. Step 4: Simplify right side
    20,505.35x = 323,486,784.06
  5. Step 5: Solve for x
    x = 323,486,784.06/20,505.35
  6. Step 6: Final answer
    x = 15,775.73

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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.