Home / 20,971.96-28,941.42-11,540.68

Finding the Fourth Proportional to 20,971.96, 28,941.42 and 11,540.68

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Solution

The fourth proportional to 20,971.96, 28,941.42 and 11,540.68 is: 15,926.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.96 : 28,941.42 = 11,540.68 : x
  2. Step 2: Convert to fraction form
    20,971.96/28,941.42 = 11,540.68/x
  3. Step 3: Cross multiply
    20,971.96x = 28,941.42 × 11,540.68
  4. Step 4: Simplify right side
    20,971.96x = 334,003,666.97
  5. Step 5: Solve for x
    x = 334,003,666.97/20,971.96
  6. Step 6: Final answer
    x = 15,926.20

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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.