Home / 39,811.14-54,937.31-21,907.80

Finding the Fourth Proportional to 39,811.14, 54,937.31 and 21,907.80

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Solution

The fourth proportional to 39,811.14, 54,937.31 and 21,907.80 is: 30,231.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,811.14 : 54,937.31 = 21,907.80 : x
  2. Step 2: Convert to fraction form
    39,811.14/54,937.31 = 21,907.80/x
  3. Step 3: Cross multiply
    39,811.14x = 54,937.31 × 21,907.80
  4. Step 4: Simplify right side
    39,811.14x = 1,203,555,490.48
  5. Step 5: Solve for x
    x = 1,203,555,490.48/39,811.14
  6. Step 6: Final answer
    x = 30,231.63

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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.