Home / 13,121.92-19,680.99-5,628.48

Finding the Fourth Proportional to 13,121.92, 19,680.99 and 5,628.48

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Solution

The fourth proportional to 13,121.92, 19,680.99 and 5,628.48 is: 8,441.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.92 : 19,680.99 = 5,628.48 : x
  2. Step 2: Convert to fraction form
    13,121.92/19,680.99 = 5,628.48/x
  3. Step 3: Cross multiply
    13,121.92x = 19,680.99 × 5,628.48
  4. Step 4: Simplify right side
    13,121.92x = 110,774,058.60
  5. Step 5: Solve for x
    x = 110,774,058.60/13,121.92
  6. Step 6: Final answer
    x = 8,441.91

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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.