Home / 28,756.86-39,684.78-15,837.60

Finding the Fourth Proportional to 28,756.86, 39,684.78 and 15,837.60

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Solution

The fourth proportional to 28,756.86, 39,684.78 and 15,837.60 is: 21,856.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,756.86 : 39,684.78 = 15,837.60 : x
  2. Step 2: Convert to fraction form
    28,756.86/39,684.78 = 15,837.60/x
  3. Step 3: Cross multiply
    28,756.86x = 39,684.78 × 15,837.60
  4. Step 4: Simplify right side
    28,756.86x = 628,511,671.73
  5. Step 5: Solve for x
    x = 628,511,671.73/28,756.86
  6. Step 6: Final answer
    x = 21,856.06

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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.