Home / 39,785.51-54,905.75-21,881.17

Finding the Fourth Proportional to 39,785.51, 54,905.75 and 21,881.17

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Solution

The fourth proportional to 39,785.51, 54,905.75 and 21,881.17 is: 30,196.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,785.51 : 54,905.75 = 21,881.17 : x
  2. Step 2: Convert to fraction form
    39,785.51/54,905.75 = 21,881.17/x
  3. Step 3: Cross multiply
    39,785.51x = 54,905.75 × 21,881.17
  4. Step 4: Simplify right side
    39,785.51x = 1,201,402,049.73
  5. Step 5: Solve for x
    x = 1,201,402,049.73/39,785.51
  6. Step 6: Final answer
    x = 30,196.97

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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.