Home / 39,780.03-54,897.33-21,876.21

Finding the Fourth Proportional to 39,780.03, 54,897.33 and 21,876.21

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Solution

The fourth proportional to 39,780.03, 54,897.33 and 21,876.21 is: 30,189.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.03 : 54,897.33 = 21,876.21 : x
  2. Step 2: Convert to fraction form
    39,780.03/54,897.33 = 21,876.21/x
  3. Step 3: Cross multiply
    39,780.03x = 54,897.33 × 21,876.21
  4. Step 4: Simplify right side
    39,780.03x = 1,200,945,519.52
  5. Step 5: Solve for x
    x = 1,200,945,519.52/39,780.03
  6. Step 6: Final answer
    x = 30,189.66

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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.