Home / 19,981.56-27,570.60-13,612.80

Finding the Fourth Proportional to 19,981.56, 27,570.60 and 13,612.80

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Solution

The fourth proportional to 19,981.56, 27,570.60 and 13,612.80 is: 18,782.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,981.56 : 27,570.60 = 13,612.80 : x
  2. Step 2: Convert to fraction form
    19,981.56/27,570.60 = 13,612.80/x
  3. Step 3: Cross multiply
    19,981.56x = 27,570.60 × 13,612.80
  4. Step 4: Simplify right side
    19,981.56x = 375,313,063.68
  5. Step 5: Solve for x
    x = 375,313,063.68/19,981.56
  6. Step 6: Final answer
    x = 18,782.97

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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.