Home / 21,271.21-31,908.62-6,480.25

Finding the Fourth Proportional to 21,271.21, 31,908.62 and 6,480.25

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Solution

The fourth proportional to 21,271.21, 31,908.62 and 6,480.25 is: 9,720.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.21 : 31,908.62 = 6,480.25 : x
  2. Step 2: Convert to fraction form
    21,271.21/31,908.62 = 6,480.25/x
  3. Step 3: Cross multiply
    21,271.21x = 31,908.62 × 6,480.25
  4. Step 4: Simplify right side
    21,271.21x = 206,775,834.76
  5. Step 5: Solve for x
    x = 206,775,834.76/21,271.21
  6. Step 6: Final answer
    x = 9,720.92

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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.