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Finding the Fourth Proportional to 5,647.86, 7,794.06 and 3,129.99

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Solution

The fourth proportional to 5,647.86, 7,794.06 and 3,129.99 is: 4,319.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,647.86 : 7,794.06 = 3,129.99 : x
  2. Step 2: Convert to fraction form
    5,647.86/7,794.06 = 3,129.99/x
  3. Step 3: Cross multiply
    5,647.86x = 7,794.06 × 3,129.99
  4. Step 4: Simplify right side
    5,647.86x = 24,395,329.86
  5. Step 5: Solve for x
    x = 24,395,329.86/5,647.86
  6. Step 6: Final answer
    x = 4,319.39

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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.