Home / 20,991.67-28,967.29-12,606.55

Finding the Fourth Proportional to 20,991.67, 28,967.29 and 12,606.55

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Solution

The fourth proportional to 20,991.67, 28,967.29 and 12,606.55 is: 17,396.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.67 : 28,967.29 = 12,606.55 : x
  2. Step 2: Convert to fraction form
    20,991.67/28,967.29 = 12,606.55/x
  3. Step 3: Cross multiply
    20,991.67x = 28,967.29 × 12,606.55
  4. Step 4: Simplify right side
    20,991.67x = 365,177,589.75
  5. Step 5: Solve for x
    x = 365,177,589.75/20,991.67
  6. Step 6: Final answer
    x = 17,396.31

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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.