Home / 28,512.80-42,704.40-18,015.20

Finding the Fourth Proportional to 28,512.80, 42,704.40 and 18,015.20

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Solution

The fourth proportional to 28,512.80, 42,704.40 and 18,015.20 is: 26,981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.80 : 42,704.40 = 18,015.20 : x
  2. Step 2: Convert to fraction form
    28,512.80/42,704.40 = 18,015.20/x
  3. Step 3: Cross multiply
    28,512.80x = 42,704.40 × 18,015.20
  4. Step 4: Simplify right side
    28,512.80x = 769,328,306.88
  5. Step 5: Solve for x
    x = 769,328,306.88/28,512.80
  6. Step 6: Final answer
    x = 26,981.86

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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.