Home / 39,684.83-54,766.64-21,780.48

Finding the Fourth Proportional to 39,684.83, 54,766.64 and 21,780.48

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Solution

The fourth proportional to 39,684.83, 54,766.64 and 21,780.48 is: 30,057.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,684.83 : 54,766.64 = 21,780.48 : x
  2. Step 2: Convert to fraction form
    39,684.83/54,766.64 = 21,780.48/x
  3. Step 3: Cross multiply
    39,684.83x = 54,766.64 × 21,780.48
  4. Step 4: Simplify right side
    39,684.83x = 1,192,843,598.28
  5. Step 5: Solve for x
    x = 1,192,843,598.28/39,684.83
  6. Step 6: Final answer
    x = 30,057.93

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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.