Home / 15,309.04-21,131.78-9,021

Finding the Fourth Proportional to 15,309.04, 21,131.78 and 9,021

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Solution

The fourth proportional to 15,309.04, 21,131.78 and 9,021 is: 12,452.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.04 : 21,131.78 = 9,021 : x
  2. Step 2: Convert to fraction form
    15,309.04/21,131.78 = 9,021/x
  3. Step 3: Cross multiply
    15,309.04x = 21,131.78 × 9,021
  4. Step 4: Simplify right side
    15,309.04x = 190,629,787.38
  5. Step 5: Solve for x
    x = 190,629,787.38/15,309.04
  6. Step 6: Final answer
    x = 12,452.11

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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.