Home / 5,078.70-7,008.28-2,840.19

Finding the Fourth Proportional to 5,078.70, 7,008.28 and 2,840.19

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Solution

The fourth proportional to 5,078.70, 7,008.28 and 2,840.19 is: 3,919.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.70 : 7,008.28 = 2,840.19 : x
  2. Step 2: Convert to fraction form
    5,078.70/7,008.28 = 2,840.19/x
  3. Step 3: Cross multiply
    5,078.70x = 7,008.28 × 2,840.19
  4. Step 4: Simplify right side
    5,078.70x = 19,904,841.09
  5. Step 5: Solve for x
    x = 19,904,841.09/5,078.70
  6. Step 6: Final answer
    x = 3,919.28

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Half scale
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Double 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.