Home / 12,515.38-18,772.38-3,155.28

Finding the Fourth Proportional to 12,515.38, 18,772.38 and 3,155.28

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Solution

The fourth proportional to 12,515.38, 18,772.38 and 3,155.28 is: 4,732.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,515.38 : 18,772.38 = 3,155.28 : x
  2. Step 2: Convert to fraction form
    12,515.38/18,772.38 = 3,155.28/x
  3. Step 3: Cross multiply
    12,515.38x = 18,772.38 × 3,155.28
  4. Step 4: Simplify right side
    12,515.38x = 59,232,115.17
  5. Step 5: Solve for x
    x = 59,232,115.17/12,515.38
  6. Step 6: Final answer
    x = 4,732.75

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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.