Home / 12,005.90-18,009.80-3,240.68

Finding the Fourth Proportional to 12,005.90, 18,009.80 and 3,240.68

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Solution

The fourth proportional to 12,005.90, 18,009.80 and 3,240.68 is: 4,861.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.90 : 18,009.80 = 3,240.68 : x
  2. Step 2: Convert to fraction form
    12,005.90/18,009.80 = 3,240.68/x
  3. Step 3: Cross multiply
    12,005.90x = 18,009.80 × 3,240.68
  4. Step 4: Simplify right side
    12,005.90x = 58,363,998.66
  5. Step 5: Solve for x
    x = 58,363,998.66/12,005.90
  6. Step 6: Final answer
    x = 4,861.28

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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.