Home / 20,971.62-28,958.34-13,929.48

Finding the Fourth Proportional to 20,971.62, 28,958.34 and 13,929.48

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Solution

The fourth proportional to 20,971.62, 28,958.34 and 13,929.48 is: 19,234.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.62 : 28,958.34 = 13,929.48 : x
  2. Step 2: Convert to fraction form
    20,971.62/28,958.34 = 13,929.48/x
  3. Step 3: Cross multiply
    20,971.62x = 28,958.34 × 13,929.48
  4. Step 4: Simplify right side
    20,971.62x = 403,374,617.86
  5. Step 5: Solve for x
    x = 403,374,617.86/20,971.62
  6. Step 6: Final answer
    x = 19,234.31

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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.