Home / 39,765.48-54,876.41-21,860.79

Finding the Fourth Proportional to 39,765.48, 54,876.41 and 21,860.79

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Solution

The fourth proportional to 39,765.48, 54,876.41 and 21,860.79 is: 30,167.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,765.48 : 54,876.41 = 21,860.79 : x
  2. Step 2: Convert to fraction form
    39,765.48/54,876.41 = 21,860.79/x
  3. Step 3: Cross multiply
    39,765.48x = 54,876.41 × 21,860.79
  4. Step 4: Simplify right side
    39,765.48x = 1,199,641,565.66
  5. Step 5: Solve for x
    x = 1,199,641,565.66/39,765.48
  6. Step 6: Final answer
    x = 30,167.91

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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.