Home / 28,375.12-39,157.74-15,628

Finding the Fourth Proportional to 28,375.12, 39,157.74 and 15,628

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Solution

The fourth proportional to 28,375.12, 39,157.74 and 15,628 is: 21,566.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.12 : 39,157.74 = 15,628 : x
  2. Step 2: Convert to fraction form
    28,375.12/39,157.74 = 15,628/x
  3. Step 3: Cross multiply
    28,375.12x = 39,157.74 × 15,628
  4. Step 4: Simplify right side
    28,375.12x = 611,957,160.72
  5. Step 5: Solve for x
    x = 611,957,160.72/28,375.12
  6. Step 6: Final answer
    x = 21,566.68

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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.