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Finding the Fourth Proportional to 8,129.52, 12,220.08 and 7,783.92

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Solution

The fourth proportional to 8,129.52, 12,220.08 and 7,783.92 is: 11,700.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.52 : 12,220.08 = 7,783.92 : x
  2. Step 2: Convert to fraction form
    8,129.52/12,220.08 = 7,783.92/x
  3. Step 3: Cross multiply
    8,129.52x = 12,220.08 × 7,783.92
  4. Step 4: Simplify right side
    8,129.52x = 95,120,125.11
  5. Step 5: Solve for x
    x = 95,120,125.11/8,129.52
  6. Step 6: Final answer
    x = 11,700.58

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.