Home / 8,427.28-12,642.41-2,879.33

Finding the Fourth Proportional to 8,427.28, 12,642.41 and 2,879.33

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Solution

The fourth proportional to 8,427.28, 12,642.41 and 2,879.33 is: 4,319.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,427.28 : 12,642.41 = 2,879.33 : x
  2. Step 2: Convert to fraction form
    8,427.28/12,642.41 = 2,879.33/x
  3. Step 3: Cross multiply
    8,427.28x = 12,642.41 × 2,879.33
  4. Step 4: Simplify right side
    8,427.28x = 36,401,670.39
  5. Step 5: Solve for x
    x = 36,401,670.39/8,427.28
  6. Step 6: Final answer
    x = 4,319.50

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Double scale
Find fourth proportional to 8,428.28, 12,643.91 and 2,880.33
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.