Home / 39,681.88-54,761.82-21,775.84

Finding the Fourth Proportional to 39,681.88, 54,761.82 and 21,775.84

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Solution

The fourth proportional to 39,681.88, 54,761.82 and 21,775.84 is: 30,051.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,681.88 : 54,761.82 = 21,775.84 : x
  2. Step 2: Convert to fraction form
    39,681.88/54,761.82 = 21,775.84/x
  3. Step 3: Cross multiply
    39,681.88x = 54,761.82 × 21,775.84
  4. Step 4: Simplify right side
    39,681.88x = 1,192,484,630.43
  5. Step 5: Solve for x
    x = 1,192,484,630.43/39,681.88
  6. Step 6: Final answer
    x = 30,051.11

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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.