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Finding the Fourth Proportional to 12,855.56, 17,739.74 and 7,549.65

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Solution

The fourth proportional to 12,855.56, 17,739.74 and 7,549.65 is: 10,417.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855.56 : 17,739.74 = 7,549.65 : x
  2. Step 2: Convert to fraction form
    12,855.56/17,739.74 = 7,549.65/x
  3. Step 3: Cross multiply
    12,855.56x = 17,739.74 × 7,549.65
  4. Step 4: Simplify right side
    12,855.56x = 133,928,846.97
  5. Step 5: Solve for x
    x = 133,928,846.97/12,855.56
  6. Step 6: Final answer
    x = 10,417.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.