Home / 39,231.81-54,140-21,326.79

Finding the Fourth Proportional to 39,231.81, 54,140 and 21,326.79

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Solution

The fourth proportional to 39,231.81, 54,140 and 21,326.79 is: 29,431.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,231.81 : 54,140 = 21,326.79 : x
  2. Step 2: Convert to fraction form
    39,231.81/54,140 = 21,326.79/x
  3. Step 3: Cross multiply
    39,231.81x = 54,140 × 21,326.79
  4. Step 4: Simplify right side
    39,231.81x = 1,154,632,410.60
  5. Step 5: Solve for x
    x = 1,154,632,410.60/39,231.81
  6. Step 6: Final answer
    x = 29,431.03

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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.