Home / 39,782.94-54,900.84-21,878.07

Finding the Fourth Proportional to 39,782.94, 54,900.84 and 21,878.07

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Solution

The fourth proportional to 39,782.94, 54,900.84 and 21,878.07 is: 30,191.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,782.94 : 54,900.84 = 21,878.07 : x
  2. Step 2: Convert to fraction form
    39,782.94/54,900.84 = 21,878.07/x
  3. Step 3: Cross multiply
    39,782.94x = 54,900.84 × 21,878.07
  4. Step 4: Simplify right side
    39,782.94x = 1,201,124,420.58
  5. Step 5: Solve for x
    x = 1,201,124,420.58/39,782.94
  6. Step 6: Final answer
    x = 30,191.95

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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.