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Finding the Fourth Proportional to 8,153.40, 12,120.11 and 7,913.96

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Solution

The fourth proportional to 8,153.40, 12,120.11 and 7,913.96 is: 11,764.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,153.40 : 12,120.11 = 7,913.96 : x
  2. Step 2: Convert to fraction form
    8,153.40/12,120.11 = 7,913.96/x
  3. Step 3: Cross multiply
    8,153.40x = 12,120.11 × 7,913.96
  4. Step 4: Simplify right side
    8,153.40x = 95,918,115.82
  5. Step 5: Solve for x
    x = 95,918,115.82/8,153.40
  6. Step 6: Final answer
    x = 11,764.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.