Home / 21,172.06-31,758.09-5,378.27

Finding the Fourth Proportional to 21,172.06, 31,758.09 and 5,378.27

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Solution

The fourth proportional to 21,172.06, 31,758.09 and 5,378.27 is: 8,067.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.06 : 31,758.09 = 5,378.27 : x
  2. Step 2: Convert to fraction form
    21,172.06/31,758.09 = 5,378.27/x
  3. Step 3: Cross multiply
    21,172.06x = 31,758.09 × 5,378.27
  4. Step 4: Simplify right side
    21,172.06x = 170,803,662.10
  5. Step 5: Solve for x
    x = 170,803,662.10/21,172.06
  6. Step 6: Final answer
    x = 8,067.41

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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.