Home / 5,078.76-7,008.66-2,840.64

Finding the Fourth Proportional to 5,078.76, 7,008.66 and 2,840.64

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Solution

The fourth proportional to 5,078.76, 7,008.66 and 2,840.64 is: 3,920.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.76 : 7,008.66 = 2,840.64 : x
  2. Step 2: Convert to fraction form
    5,078.76/7,008.66 = 2,840.64/x
  3. Step 3: Cross multiply
    5,078.76x = 7,008.66 × 2,840.64
  4. Step 4: Simplify right side
    5,078.76x = 19,909,079.94
  5. Step 5: Solve for x
    x = 19,909,079.94/5,078.76
  6. Step 6: Final answer
    x = 3,920.07

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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.