Home / 20,561.80-28,376.96-11,611.48

Finding the Fourth Proportional to 20,561.80, 28,376.96 and 11,611.48

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Solution

The fourth proportional to 20,561.80, 28,376.96 and 11,611.48 is: 16,024.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.80 : 28,376.96 = 11,611.48 : x
  2. Step 2: Convert to fraction form
    20,561.80/28,376.96 = 11,611.48/x
  3. Step 3: Cross multiply
    20,561.80x = 28,376.96 × 11,611.48
  4. Step 4: Simplify right side
    20,561.80x = 329,498,503.50
  5. Step 5: Solve for x
    x = 329,498,503.50/20,561.80
  6. Step 6: Final answer
    x = 16,024.79

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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.