Home / 21,161.30-31,744.11-7,308.50

Finding the Fourth Proportional to 21,161.30, 31,744.11 and 7,308.50

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Solution

The fourth proportional to 21,161.30, 31,744.11 and 7,308.50 is: 10,963.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.30 : 31,744.11 = 7,308.50 : x
  2. Step 2: Convert to fraction form
    21,161.30/31,744.11 = 7,308.50/x
  3. Step 3: Cross multiply
    21,161.30x = 31,744.11 × 7,308.50
  4. Step 4: Simplify right side
    21,161.30x = 232,001,827.94
  5. Step 5: Solve for x
    x = 232,001,827.94/21,161.30
  6. Step 6: Final answer
    x = 10,963.50

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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.