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Finding the Fourth Proportional to 9,153.96, 12,640.86 and 8,662.92

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Solution

The fourth proportional to 9,153.96, 12,640.86 and 8,662.92 is: 11,962.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,153.96 : 12,640.86 = 8,662.92 : x
  2. Step 2: Convert to fraction form
    9,153.96/12,640.86 = 8,662.92/x
  3. Step 3: Cross multiply
    9,153.96x = 12,640.86 × 8,662.92
  4. Step 4: Simplify right side
    9,153.96x = 109,506,758.91
  5. Step 5: Solve for x
    x = 109,506,758.91/9,153.96
  6. Step 6: Final answer
    x = 11,962.77

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Half scale
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Double scale
Find fourth proportional to 9,154.96, 12,642.24 and 8,663.92
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.