Home / 21,299.13-31,952.52-8,812.35

Finding the Fourth Proportional to 21,299.13, 31,952.52 and 8,812.35

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Solution

The fourth proportional to 21,299.13, 31,952.52 and 8,812.35 is: 13,220.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.13 : 31,952.52 = 8,812.35 : x
  2. Step 2: Convert to fraction form
    21,299.13/31,952.52 = 8,812.35/x
  3. Step 3: Cross multiply
    21,299.13x = 31,952.52 × 8,812.35
  4. Step 4: Simplify right side
    21,299.13x = 281,576,789.62
  5. Step 5: Solve for x
    x = 281,576,789.62/21,299.13
  6. Step 6: Final answer
    x = 13,220.11

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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.