Home / 20,561.88-28,376.30-11,609.45

Finding the Fourth Proportional to 20,561.88, 28,376.30 and 11,609.45

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Solution

The fourth proportional to 20,561.88, 28,376.30 and 11,609.45 is: 16,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.88 : 28,376.30 = 11,609.45 : x
  2. Step 2: Convert to fraction form
    20,561.88/28,376.30 = 11,609.45/x
  3. Step 3: Cross multiply
    20,561.88x = 28,376.30 × 11,609.45
  4. Step 4: Simplify right side
    20,561.88x = 329,433,236.04
  5. Step 5: Solve for x
    x = 329,433,236.04/20,561.88
  6. Step 6: Final answer
    x = 16,021.55

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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.