Home / 28,515.15-42,758.28-13,517.73

Finding the Fourth Proportional to 28,515.15, 42,758.28 and 13,517.73

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Solution

The fourth proportional to 28,515.15, 42,758.28 and 13,517.73 is: 20,269.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.15 : 42,758.28 = 13,517.73 : x
  2. Step 2: Convert to fraction form
    28,515.15/42,758.28 = 13,517.73/x
  3. Step 3: Cross multiply
    28,515.15x = 42,758.28 × 13,517.73
  4. Step 4: Simplify right side
    28,515.15x = 577,994,884.30
  5. Step 5: Solve for x
    x = 577,994,884.30/28,515.15
  6. Step 6: Final answer
    x = 20,269.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.