Home / 20,331.72-28,051.38-11,377.80

Finding the Fourth Proportional to 20,331.72, 28,051.38 and 11,377.80

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Solution

The fourth proportional to 20,331.72, 28,051.38 and 11,377.80 is: 15,697.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.72 : 28,051.38 = 11,377.80 : x
  2. Step 2: Convert to fraction form
    20,331.72/28,051.38 = 11,377.80/x
  3. Step 3: Cross multiply
    20,331.72x = 28,051.38 × 11,377.80
  4. Step 4: Simplify right side
    20,331.72x = 319,162,991.36
  5. Step 5: Solve for x
    x = 319,162,991.36/20,331.72
  6. Step 6: Final answer
    x = 15,697.79

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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.