Home / 39,670.81-54,745.39-21,765.66

Finding the Fourth Proportional to 39,670.81, 54,745.39 and 21,765.66

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Solution

The fourth proportional to 39,670.81, 54,745.39 and 21,765.66 is: 30,036.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,670.81 : 54,745.39 = 21,765.66 : x
  2. Step 2: Convert to fraction form
    39,670.81/54,745.39 = 21,765.66/x
  3. Step 3: Cross multiply
    39,670.81x = 54,745.39 × 21,765.66
  4. Step 4: Simplify right side
    39,670.81x = 1,191,569,736.38
  5. Step 5: Solve for x
    x = 1,191,569,736.38/39,670.81
  6. Step 6: Final answer
    x = 30,036.43

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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.