Home / 20,760.30-28,704.51-18,135.90

Finding the Fourth Proportional to 20,760.30, 28,704.51 and 18,135.90

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Solution

The fourth proportional to 20,760.30, 28,704.51 and 18,135.90 is: 25,075.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.30 : 28,704.51 = 18,135.90 : x
  2. Step 2: Convert to fraction form
    20,760.30/28,704.51 = 18,135.90/x
  3. Step 3: Cross multiply
    20,760.30x = 28,704.51 × 18,135.90
  4. Step 4: Simplify right side
    20,760.30x = 520,582,122.91
  5. Step 5: Solve for x
    x = 520,582,122.91/20,760.30
  6. Step 6: Final answer
    x = 25,075.85

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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.