Home / 13,643.92-18,821.71-7,974.96

Finding the Fourth Proportional to 13,643.92, 18,821.71 and 7,974.96

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Solution

The fourth proportional to 13,643.92, 18,821.71 and 7,974.96 is: 11,001.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,643.92 : 18,821.71 = 7,974.96 : x
  2. Step 2: Convert to fraction form
    13,643.92/18,821.71 = 7,974.96/x
  3. Step 3: Cross multiply
    13,643.92x = 18,821.71 × 7,974.96
  4. Step 4: Simplify right side
    13,643.92x = 150,102,404.32
  5. Step 5: Solve for x
    x = 150,102,404.32/13,643.92
  6. Step 6: Final answer
    x = 11,001.42

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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.