Home / 18,018.30-27,078.60-12,215.46

Finding the Fourth Proportional to 18,018.30, 27,078.60 and 12,215.46

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Solution

The fourth proportional to 18,018.30, 27,078.60 and 12,215.46 is: 18,357.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,018.30 : 27,078.60 = 12,215.46 : x
  2. Step 2: Convert to fraction form
    18,018.30/27,078.60 = 12,215.46/x
  3. Step 3: Cross multiply
    18,018.30x = 27,078.60 × 12,215.46
  4. Step 4: Simplify right side
    18,018.30x = 330,777,555.16
  5. Step 5: Solve for x
    x = 330,777,555.16/18,018.30
  6. Step 6: Final answer
    x = 18,357.87

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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.