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Finding the Fourth Proportional to 5,078.85, 7,009.11 and 2,840.82

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Solution

The fourth proportional to 5,078.85, 7,009.11 and 2,840.82 is: 3,920.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.85 : 7,009.11 = 2,840.82 : x
  2. Step 2: Convert to fraction form
    5,078.85/7,009.11 = 2,840.82/x
  3. Step 3: Cross multiply
    5,078.85x = 7,009.11 × 2,840.82
  4. Step 4: Simplify right side
    5,078.85x = 19,911,625.02
  5. Step 5: Solve for x
    x = 19,911,625.02/5,078.85
  6. Step 6: Final answer
    x = 3,920.50

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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.