Home / 18,215.76-27,311.64-7,123.68

Finding the Fourth Proportional to 18,215.76, 27,311.64 and 7,123.68

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Solution

The fourth proportional to 18,215.76, 27,311.64 and 7,123.68 is: 10,680.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,215.76 : 27,311.64 = 7,123.68 : x
  2. Step 2: Convert to fraction form
    18,215.76/27,311.64 = 7,123.68/x
  3. Step 3: Cross multiply
    18,215.76x = 27,311.64 × 7,123.68
  4. Step 4: Simplify right side
    18,215.76x = 194,559,383.64
  5. Step 5: Solve for x
    x = 194,559,383.64/18,215.76
  6. Step 6: Final answer
    x = 10,680.83

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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.