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Finding the Fourth Proportional to 6,647.87, 9,966.45 and 3,686.24

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Solution

The fourth proportional to 6,647.87, 9,966.45 and 3,686.24 is: 5,526.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,647.87 : 9,966.45 = 3,686.24 : x
  2. Step 2: Convert to fraction form
    6,647.87/9,966.45 = 3,686.24/x
  3. Step 3: Cross multiply
    6,647.87x = 9,966.45 × 3,686.24
  4. Step 4: Simplify right side
    6,647.87x = 36,738,726.65
  5. Step 5: Solve for x
    x = 36,738,726.65/6,647.87
  6. Step 6: Final answer
    x = 5,526.39

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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.