Home / 20,902.72-28,845.48-11,471.28

Finding the Fourth Proportional to 20,902.72, 28,845.48 and 11,471.28

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Solution

The fourth proportional to 20,902.72, 28,845.48 and 11,471.28 is: 15,830.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,902.72 : 28,845.48 = 11,471.28 : x
  2. Step 2: Convert to fraction form
    20,902.72/28,845.48 = 11,471.28/x
  3. Step 3: Cross multiply
    20,902.72x = 28,845.48 × 11,471.28
  4. Step 4: Simplify right side
    20,902.72x = 330,894,577.81
  5. Step 5: Solve for x
    x = 330,894,577.81/20,902.72
  6. Step 6: Final answer
    x = 15,830.22

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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.