Home / 28,653.12-39,540.28-15,906.86

Finding the Fourth Proportional to 28,653.12, 39,540.28 and 15,906.86

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Solution

The fourth proportional to 28,653.12, 39,540.28 and 15,906.86 is: 21,950.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,653.12 : 39,540.28 = 15,906.86 : x
  2. Step 2: Convert to fraction form
    28,653.12/39,540.28 = 15,906.86/x
  3. Step 3: Cross multiply
    28,653.12x = 39,540.28 × 15,906.86
  4. Step 4: Simplify right side
    28,653.12x = 628,961,817.06
  5. Step 5: Solve for x
    x = 628,961,817.06/28,653.12
  6. Step 6: Final answer
    x = 21,950.90

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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.