Home / 39,078-53,927.33-21,172.95

Finding the Fourth Proportional to 39,078, 53,927.33 and 21,172.95

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Solution

The fourth proportional to 39,078, 53,927.33 and 21,172.95 is: 29,218.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,078 : 53,927.33 = 21,172.95 : x
  2. Step 2: Convert to fraction form
    39,078/53,927.33 = 21,172.95/x
  3. Step 3: Cross multiply
    39,078x = 53,927.33 × 21,172.95
  4. Step 4: Simplify right side
    39,078x = 1,141,800,555.86
  5. Step 5: Solve for x
    x = 1,141,800,555.86/39,078
  6. Step 6: Final answer
    x = 29,218.50

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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.