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Finding the Fourth Proportional to 6,659.54, 9,988.63 and 4,186.87

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Solution

The fourth proportional to 6,659.54, 9,988.63 and 4,186.87 is: 6,279.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,659.54 : 9,988.63 = 4,186.87 : x
  2. Step 2: Convert to fraction form
    6,659.54/9,988.63 = 4,186.87/x
  3. Step 3: Cross multiply
    6,659.54x = 9,988.63 × 4,186.87
  4. Step 4: Simplify right side
    6,659.54x = 41,821,059.85
  5. Step 5: Solve for x
    x = 41,821,059.85/6,659.54
  6. Step 6: Final answer
    x = 6,279.87

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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.