Home / 15,708.33-21,679.25-8,634.60

Finding the Fourth Proportional to 15,708.33, 21,679.25 and 8,634.60

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Solution

The fourth proportional to 15,708.33, 21,679.25 and 8,634.60 is: 11,916.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708.33 : 21,679.25 = 8,634.60 : x
  2. Step 2: Convert to fraction form
    15,708.33/21,679.25 = 8,634.60/x
  3. Step 3: Cross multiply
    15,708.33x = 21,679.25 × 8,634.60
  4. Step 4: Simplify right side
    15,708.33x = 187,191,608.88
  5. Step 5: Solve for x
    x = 187,191,608.88/15,708.33
  6. Step 6: Final answer
    x = 11,916.71

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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.