Home / 20,517.86-28,313.81-11,567.21

Finding the Fourth Proportional to 20,517.86, 28,313.81 and 11,567.21

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Solution

The fourth proportional to 20,517.86, 28,313.81 and 11,567.21 is: 15,962.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.86 : 28,313.81 = 11,567.21 : x
  2. Step 2: Convert to fraction form
    20,517.86/28,313.81 = 11,567.21/x
  3. Step 3: Cross multiply
    20,517.86x = 28,313.81 × 11,567.21
  4. Step 4: Simplify right side
    20,517.86x = 327,511,885.87
  5. Step 5: Solve for x
    x = 327,511,885.87/20,517.86
  6. Step 6: Final answer
    x = 15,962.29

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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.