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Finding the Fourth Proportional to 28,153.49, 38,840.49 and 16,210.40

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Solution

The fourth proportional to 28,153.49, 38,840.49 and 16,210.40 is: 22,363.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,153.49 : 38,840.49 = 16,210.40 : x
  2. Step 2: Convert to fraction form
    28,153.49/38,840.49 = 16,210.40/x
  3. Step 3: Cross multiply
    28,153.49x = 38,840.49 × 16,210.40
  4. Step 4: Simplify right side
    28,153.49x = 629,619,684.89
  5. Step 5: Solve for x
    x = 629,619,684.89/28,153.49
  6. Step 6: Final answer
    x = 22,363.83

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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.