Home / 39,688.32-54,773.16-21,786.84

Finding the Fourth Proportional to 39,688.32, 54,773.16 and 21,786.84

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Solution

The fourth proportional to 39,688.32, 54,773.16 and 21,786.84 is: 30,067.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,688.32 : 54,773.16 = 21,786.84 : x
  2. Step 2: Convert to fraction form
    39,688.32/54,773.16 = 21,786.84/x
  3. Step 3: Cross multiply
    39,688.32x = 54,773.16 × 21,786.84
  4. Step 4: Simplify right side
    39,688.32x = 1,193,334,073.21
  5. Step 5: Solve for x
    x = 1,193,334,073.21/39,688.32
  6. Step 6: Final answer
    x = 30,067.64

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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.