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Finding the Fourth Proportional to 28,205.58, 38,930.58 and 16,881.78

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Solution

The fourth proportional to 28,205.58, 38,930.58 and 16,881.78 is: 23,300.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.58 : 38,930.58 = 16,881.78 : x
  2. Step 2: Convert to fraction form
    28,205.58/38,930.58 = 16,881.78/x
  3. Step 3: Cross multiply
    28,205.58x = 38,930.58 × 16,881.78
  4. Step 4: Simplify right side
    28,205.58x = 657,217,486.83
  5. Step 5: Solve for x
    x = 657,217,486.83/28,205.58
  6. Step 6: Final answer
    x = 23,300.97

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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.