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Finding the Fourth Proportional to 8,128.80, 12,200.40 and 6,962.40

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Solution

The fourth proportional to 8,128.80, 12,200.40 and 6,962.40 is: 10,449.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.80 : 12,200.40 = 6,962.40 : x
  2. Step 2: Convert to fraction form
    8,128.80/12,200.40 = 6,962.40/x
  3. Step 3: Cross multiply
    8,128.80x = 12,200.40 × 6,962.40
  4. Step 4: Simplify right side
    8,128.80x = 84,944,064.96
  5. Step 5: Solve for x
    x = 84,944,064.96/8,128.80
  6. Step 6: Final answer
    x = 10,449.77

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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.