Home / 19,845.12-27,375.84-15,121.20

Finding the Fourth Proportional to 19,845.12, 27,375.84 and 15,121.20

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Solution

The fourth proportional to 19,845.12, 27,375.84 and 15,121.20 is: 20,859.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,845.12 : 27,375.84 = 15,121.20 : x
  2. Step 2: Convert to fraction form
    19,845.12/27,375.84 = 15,121.20/x
  3. Step 3: Cross multiply
    19,845.12x = 27,375.84 × 15,121.20
  4. Step 4: Simplify right side
    19,845.12x = 413,955,551.81
  5. Step 5: Solve for x
    x = 413,955,551.81/19,845.12
  6. Step 6: Final answer
    x = 20,859.31

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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.