Home / 19,921.76-27,480.56-12,456.80

Finding the Fourth Proportional to 19,921.76, 27,480.56 and 12,456.80

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Solution

The fourth proportional to 19,921.76, 27,480.56 and 12,456.80 is: 17,183.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.76 : 27,480.56 = 12,456.80 : x
  2. Step 2: Convert to fraction form
    19,921.76/27,480.56 = 12,456.80/x
  3. Step 3: Cross multiply
    19,921.76x = 27,480.56 × 12,456.80
  4. Step 4: Simplify right side
    19,921.76x = 342,319,839.81
  5. Step 5: Solve for x
    x = 342,319,839.81/19,921.76
  6. Step 6: Final answer
    x = 17,183.21

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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.