Home / 28,221.96-38,940.51-16,121.76

Finding the Fourth Proportional to 28,221.96, 38,940.51 and 16,121.76

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Solution

The fourth proportional to 28,221.96, 38,940.51 and 16,121.76 is: 22,244.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,221.96 : 38,940.51 = 16,121.76 : x
  2. Step 2: Convert to fraction form
    28,221.96/38,940.51 = 16,121.76/x
  3. Step 3: Cross multiply
    28,221.96x = 38,940.51 × 16,121.76
  4. Step 4: Simplify right side
    28,221.96x = 627,789,556.50
  5. Step 5: Solve for x
    x = 627,789,556.50/28,221.96
  6. Step 6: Final answer
    x = 22,244.72

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Half scale
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Double scale
Find fourth proportional to 28,222.96, 38,941.89 and 16,122.76
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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.