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Finding the Fourth Proportional to 8,099.88, 12,128.80 and 6,937.35

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Solution

The fourth proportional to 8,099.88, 12,128.80 and 6,937.35 is: 10,388.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,099.88 : 12,128.80 = 6,937.35 : x
  2. Step 2: Convert to fraction form
    8,099.88/12,128.80 = 6,937.35/x
  3. Step 3: Cross multiply
    8,099.88x = 12,128.80 × 6,937.35
  4. Step 4: Simplify right side
    8,099.88x = 84,141,784.83
  5. Step 5: Solve for x
    x = 84,141,784.83/8,099.88
  6. Step 6: Final answer
    x = 10,388.03

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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.