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Finding the Fourth Proportional to 8,323.66, 12,485.89 and 3,129.13

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Solution

The fourth proportional to 8,323.66, 12,485.89 and 3,129.13 is: 4,693.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,323.66 : 12,485.89 = 3,129.13 : x
  2. Step 2: Convert to fraction form
    8,323.66/12,485.89 = 3,129.13/x
  3. Step 3: Cross multiply
    8,323.66x = 12,485.89 × 3,129.13
  4. Step 4: Simplify right side
    8,323.66x = 39,069,910.55
  5. Step 5: Solve for x
    x = 39,069,910.55/8,323.66
  6. Step 6: Final answer
    x = 4,693.84

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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.