Home / 21,136.80-31,662.14-10,009.75

Finding the Fourth Proportional to 21,136.80, 31,662.14 and 10,009.75

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Solution

The fourth proportional to 21,136.80, 31,662.14 and 10,009.75 is: 14,994.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.80 : 31,662.14 = 10,009.75 : x
  2. Step 2: Convert to fraction form
    21,136.80/31,662.14 = 10,009.75/x
  3. Step 3: Cross multiply
    21,136.80x = 31,662.14 × 10,009.75
  4. Step 4: Simplify right side
    21,136.80x = 316,930,105.87
  5. Step 5: Solve for x
    x = 316,930,105.87/21,136.80
  6. Step 6: Final answer
    x = 14,994.23

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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.