Home / 21,271.79-31,907.75-6,480.65

Finding the Fourth Proportional to 21,271.79, 31,907.75 and 6,480.65

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Solution

The fourth proportional to 21,271.79, 31,907.75 and 6,480.65 is: 9,720.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.79 : 31,907.75 = 6,480.65 : x
  2. Step 2: Convert to fraction form
    21,271.79/31,907.75 = 6,480.65/x
  3. Step 3: Cross multiply
    21,271.79x = 31,907.75 × 6,480.65
  4. Step 4: Simplify right side
    21,271.79x = 206,782,768.10
  5. Step 5: Solve for x
    x = 206,782,768.10/21,271.79
  6. Step 6: Final answer
    x = 9,720.99

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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.