Home / 20,905.34-28,849.32-11,473.70

Finding the Fourth Proportional to 20,905.34, 28,849.32 and 11,473.70

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Solution

The fourth proportional to 20,905.34, 28,849.32 and 11,473.70 is: 15,833.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.34 : 28,849.32 = 11,473.70 : x
  2. Step 2: Convert to fraction form
    20,905.34/28,849.32 = 11,473.70/x
  3. Step 3: Cross multiply
    20,905.34x = 28,849.32 × 11,473.70
  4. Step 4: Simplify right side
    20,905.34x = 331,008,298.64
  5. Step 5: Solve for x
    x = 331,008,298.64/20,905.34
  6. Step 6: Final answer
    x = 15,833.68

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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.