Home / 39,665.34-54,738.59-21,759.89

Finding the Fourth Proportional to 39,665.34, 54,738.59 and 21,759.89

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Solution

The fourth proportional to 39,665.34, 54,738.59 and 21,759.89 is: 30,028.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,665.34 : 54,738.59 = 21,759.89 : x
  2. Step 2: Convert to fraction form
    39,665.34/54,738.59 = 21,759.89/x
  3. Step 3: Cross multiply
    39,665.34x = 54,738.59 × 21,759.89
  4. Step 4: Simplify right side
    39,665.34x = 1,191,105,314.66
  5. Step 5: Solve for x
    x = 1,191,105,314.66/39,665.34
  6. Step 6: Final answer
    x = 30,028.87

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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.