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Finding the Fourth Proportional to 28,124.70, 38,819.67 and 16,191.90

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Solution

The fourth proportional to 28,124.70, 38,819.67 and 16,191.90 is: 22,349.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,124.70 : 38,819.67 = 16,191.90 : x
  2. Step 2: Convert to fraction form
    28,124.70/38,819.67 = 16,191.90/x
  3. Step 3: Cross multiply
    28,124.70x = 38,819.67 × 16,191.90
  4. Step 4: Simplify right side
    28,124.70x = 628,564,214.67
  5. Step 5: Solve for x
    x = 628,564,214.67/28,124.70
  6. Step 6: Final answer
    x = 22,349.19

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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.