Home / 12,128.44-18,178.06-6,581.56

Finding the Fourth Proportional to 12,128.44, 18,178.06 and 6,581.56

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Solution

The fourth proportional to 12,128.44, 18,178.06 and 6,581.56 is: 9,864.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.44 : 18,178.06 = 6,581.56 : x
  2. Step 2: Convert to fraction form
    12,128.44/18,178.06 = 6,581.56/x
  3. Step 3: Cross multiply
    12,128.44x = 18,178.06 × 6,581.56
  4. Step 4: Simplify right side
    12,128.44x = 119,639,992.57
  5. Step 5: Solve for x
    x = 119,639,992.57/12,128.44
  6. Step 6: Final answer
    x = 9,864.42

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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.