Home / 20,827.71-31,214.75-7,664.49

Finding the Fourth Proportional to 20,827.71, 31,214.75 and 7,664.49

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Solution

The fourth proportional to 20,827.71, 31,214.75 and 7,664.49 is: 11,486.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.71 : 31,214.75 = 7,664.49 : x
  2. Step 2: Convert to fraction form
    20,827.71/31,214.75 = 7,664.49/x
  3. Step 3: Cross multiply
    20,827.71x = 31,214.75 × 7,664.49
  4. Step 4: Simplify right side
    20,827.71x = 239,245,100.91
  5. Step 5: Solve for x
    x = 239,245,100.91/20,827.71
  6. Step 6: Final answer
    x = 11,486.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.