Home / 12,878.28-19,317.42-8,290.44

Finding the Fourth Proportional to 12,878.28, 19,317.42 and 8,290.44

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Solution

The fourth proportional to 12,878.28, 19,317.42 and 8,290.44 is: 12,435.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878.28 : 19,317.42 = 8,290.44 : x
  2. Step 2: Convert to fraction form
    12,878.28/19,317.42 = 8,290.44/x
  3. Step 3: Cross multiply
    12,878.28x = 19,317.42 × 8,290.44
  4. Step 4: Simplify right side
    12,878.28x = 160,149,911.46
  5. Step 5: Solve for x
    x = 160,149,911.46/12,878.28
  6. Step 6: Final answer
    x = 12,435.66

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Double scale
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Similar ratio
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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.