Home / 39,679.88-54,759.81-21,775.52

Finding the Fourth Proportional to 39,679.88, 54,759.81 and 21,775.52

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Solution

The fourth proportional to 39,679.88, 54,759.81 and 21,775.52 is: 30,051.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,679.88 : 54,759.81 = 21,775.52 : x
  2. Step 2: Convert to fraction form
    39,679.88/54,759.81 = 21,775.52/x
  3. Step 3: Cross multiply
    39,679.88x = 54,759.81 × 21,775.52
  4. Step 4: Simplify right side
    39,679.88x = 1,192,423,502.17
  5. Step 5: Solve for x
    x = 1,192,423,502.17/39,679.88
  6. Step 6: Final answer
    x = 30,051.09

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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.