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Finding the Fourth Proportional to 6,666.50, 10,005.78 and 3,549.12

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Solution

The fourth proportional to 6,666.50, 10,005.78 and 3,549.12 is: 5,326.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,666.50 : 10,005.78 = 3,549.12 : x
  2. Step 2: Convert to fraction form
    6,666.50/10,005.78 = 3,549.12/x
  3. Step 3: Cross multiply
    6,666.50x = 10,005.78 × 3,549.12
  4. Step 4: Simplify right side
    6,666.50x = 35,511,713.91
  5. Step 5: Solve for x
    x = 35,511,713.91/6,666.50
  6. Step 6: Final answer
    x = 5,326.89

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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.