Home / 5,078.91-7,008.85-2,840.76

Finding the Fourth Proportional to 5,078.91, 7,008.85 and 2,840.76

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Solution

The fourth proportional to 5,078.91, 7,008.85 and 2,840.76 is: 3,920.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.91 : 7,008.85 = 2,840.76 : x
  2. Step 2: Convert to fraction form
    5,078.91/7,008.85 = 2,840.76/x
  3. Step 3: Cross multiply
    5,078.91x = 7,008.85 × 2,840.76
  4. Step 4: Simplify right side
    5,078.91x = 19,910,460.73
  5. Step 5: Solve for x
    x = 19,910,460.73/5,078.91
  6. Step 6: Final answer
    x = 3,920.22

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Half scale
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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.