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Finding the Fourth Proportional to 5,159.90, 7,739.64 and 2,385.66

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Solution

The fourth proportional to 5,159.90, 7,739.64 and 2,385.66 is: 3,578.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.90 : 7,739.64 = 2,385.66 : x
  2. Step 2: Convert to fraction form
    5,159.90/7,739.64 = 2,385.66/x
  3. Step 3: Cross multiply
    5,159.90x = 7,739.64 × 2,385.66
  4. Step 4: Simplify right side
    5,159.90x = 18,464,149.56
  5. Step 5: Solve for x
    x = 18,464,149.56/5,159.90
  6. Step 6: Final answer
    x = 3,578.39

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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.