Home / 5,115.21-7,672.41-1,605.09

Finding the Fourth Proportional to 5,115.21, 7,672.41 and 1,605.09

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Solution

The fourth proportional to 5,115.21, 7,672.41 and 1,605.09 is: 2,407.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.21 : 7,672.41 = 1,605.09 : x
  2. Step 2: Convert to fraction form
    5,115.21/7,672.41 = 1,605.09/x
  3. Step 3: Cross multiply
    5,115.21x = 7,672.41 × 1,605.09
  4. Step 4: Simplify right side
    5,115.21x = 12,314,908.57
  5. Step 5: Solve for x
    x = 12,314,908.57/5,115.21
  6. Step 6: Final answer
    x = 2,407.51

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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.