Home / 20,769.96-28,654.32-13,214.28

Finding the Fourth Proportional to 20,769.96, 28,654.32 and 13,214.28

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Solution

The fourth proportional to 20,769.96, 28,654.32 and 13,214.28 is: 18,230.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.96 : 28,654.32 = 13,214.28 : x
  2. Step 2: Convert to fraction form
    20,769.96/28,654.32 = 13,214.28/x
  3. Step 3: Cross multiply
    20,769.96x = 28,654.32 × 13,214.28
  4. Step 4: Simplify right side
    20,769.96x = 378,646,207.69
  5. Step 5: Solve for x
    x = 378,646,207.69/20,769.96
  6. Step 6: Final answer
    x = 18,230.47

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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.