Home / 15,451.67-21,323.33-8,378.09

Finding the Fourth Proportional to 15,451.67, 21,323.33 and 8,378.09

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Solution

The fourth proportional to 15,451.67, 21,323.33 and 8,378.09 is: 11,561.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,451.67 : 21,323.33 = 8,378.09 : x
  2. Step 2: Convert to fraction form
    15,451.67/21,323.33 = 8,378.09/x
  3. Step 3: Cross multiply
    15,451.67x = 21,323.33 × 8,378.09
  4. Step 4: Simplify right side
    15,451.67x = 178,648,907.78
  5. Step 5: Solve for x
    x = 178,648,907.78/15,451.67
  6. Step 6: Final answer
    x = 11,561.78

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1.5x scale

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.