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Finding the Fourth Proportional to 9,168.75, 12,620.75 and 7,987.77

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Solution

The fourth proportional to 9,168.75, 12,620.75 and 7,987.77 is: 10,995.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,168.75 : 12,620.75 = 7,987.77 : x
  2. Step 2: Convert to fraction form
    9,168.75/12,620.75 = 7,987.77/x
  3. Step 3: Cross multiply
    9,168.75x = 12,620.75 × 7,987.77
  4. Step 4: Simplify right side
    9,168.75x = 100,811,608.29
  5. Step 5: Solve for x
    x = 100,811,608.29/9,168.75
  6. Step 6: Final answer
    x = 10,995.13

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Half scale
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Double scale
Find fourth proportional to 9,169.75, 12,622.12 and 7,988.77
Similar ratio
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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.