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Finding the Fourth Proportional to 8,091.76, 12,129 and 5,776.24

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Solution

The fourth proportional to 8,091.76, 12,129 and 5,776.24 is: 8,658.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,091.76 : 12,129 = 5,776.24 : x
  2. Step 2: Convert to fraction form
    8,091.76/12,129 = 5,776.24/x
  3. Step 3: Cross multiply
    8,091.76x = 12,129 × 5,776.24
  4. Step 4: Simplify right side
    8,091.76x = 70,060,014.96
  5. Step 5: Solve for x
    x = 70,060,014.96/8,091.76
  6. Step 6: Final answer
    x = 8,658.19

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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.