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Finding the Fourth Proportional to 8,975.25, 12,385.71 and 4,996.71

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Solution

The fourth proportional to 8,975.25, 12,385.71 and 4,996.71 is: 6,895.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,975.25 : 12,385.71 = 4,996.71 : x
  2. Step 2: Convert to fraction form
    8,975.25/12,385.71 = 4,996.71/x
  3. Step 3: Cross multiply
    8,975.25x = 12,385.71 × 4,996.71
  4. Step 4: Simplify right side
    8,975.25x = 61,887,801.01
  5. Step 5: Solve for x
    x = 61,887,801.01/8,975.25
  6. Step 6: Final answer
    x = 6,895.38

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Double scale
Find fourth proportional to 8,976.25, 12,387.09 and 4,997.71
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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.