Home / 21,172.09-31,735.89-7,127.24

Finding the Fourth Proportional to 21,172.09, 31,735.89 and 7,127.24

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Solution

The fourth proportional to 21,172.09, 31,735.89 and 7,127.24 is: 10,683.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.09 : 31,735.89 = 7,127.24 : x
  2. Step 2: Convert to fraction form
    21,172.09/31,735.89 = 7,127.24/x
  3. Step 3: Cross multiply
    21,172.09x = 31,735.89 × 7,127.24
  4. Step 4: Simplify right side
    21,172.09x = 226,189,304.64
  5. Step 5: Solve for x
    x = 226,189,304.64/21,172.09
  6. Step 6: Final answer
    x = 10,683.37

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1.5x scale

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.