Home / 12,005.88-18,008.81-3,240.79

Finding the Fourth Proportional to 12,005.88, 18,008.81 and 3,240.79

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Solution

The fourth proportional to 12,005.88, 18,008.81 and 3,240.79 is: 4,861.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.88 : 18,008.81 = 3,240.79 : x
  2. Step 2: Convert to fraction form
    12,005.88/18,008.81 = 3,240.79/x
  3. Step 3: Cross multiply
    12,005.88x = 18,008.81 × 3,240.79
  4. Step 4: Simplify right side
    12,005.88x = 58,362,771.36
  5. Step 5: Solve for x
    x = 58,362,771.36/12,005.88
  6. Step 6: Final answer
    x = 4,861.18

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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.