Home / 15,742.38-21,721.32-11,964.54

Finding the Fourth Proportional to 15,742.38, 21,721.32 and 11,964.54

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Solution

The fourth proportional to 15,742.38, 21,721.32 and 11,964.54 is: 16,508.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.38 : 21,721.32 = 11,964.54 : x
  2. Step 2: Convert to fraction form
    15,742.38/21,721.32 = 11,964.54/x
  3. Step 3: Cross multiply
    15,742.38x = 21,721.32 × 11,964.54
  4. Step 4: Simplify right side
    15,742.38x = 259,885,601.99
  5. Step 5: Solve for x
    x = 259,885,601.99/15,742.38
  6. Step 6: Final answer
    x = 16,508.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.