Home / 39,681.91-54,759.31-21,777.21

Finding the Fourth Proportional to 39,681.91, 54,759.31 and 21,777.21

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Solution

The fourth proportional to 39,681.91, 54,759.31 and 21,777.21 is: 30,051.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,681.91 : 54,759.31 = 21,777.21 : x
  2. Step 2: Convert to fraction form
    39,681.91/54,759.31 = 21,777.21/x
  3. Step 3: Cross multiply
    39,681.91x = 54,759.31 × 21,777.21
  4. Step 4: Simplify right side
    39,681.91x = 1,192,504,938.88
  5. Step 5: Solve for x
    x = 1,192,504,938.88/39,681.91
  6. Step 6: Final answer
    x = 30,051.60

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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.