Home / 38,579.28-53,240.84-21,811.28

Finding the Fourth Proportional to 38,579.28, 53,240.84 and 21,811.28

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Solution

The fourth proportional to 38,579.28, 53,240.84 and 21,811.28 is: 30,100.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,579.28 : 53,240.84 = 21,811.28 : x
  2. Step 2: Convert to fraction form
    38,579.28/53,240.84 = 21,811.28/x
  3. Step 3: Cross multiply
    38,579.28x = 53,240.84 × 21,811.28
  4. Step 4: Simplify right side
    38,579.28x = 1,161,250,868.68
  5. Step 5: Solve for x
    x = 1,161,250,868.68/38,579.28
  6. Step 6: Final answer
    x = 30,100.38

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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.