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Finding the Fourth Proportional to 8,659.85, 12,993.35 and 4,219.83

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Solution

The fourth proportional to 8,659.85, 12,993.35 and 4,219.83 is: 6,331.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.85 : 12,993.35 = 4,219.83 : x
  2. Step 2: Convert to fraction form
    8,659.85/12,993.35 = 4,219.83/x
  3. Step 3: Cross multiply
    8,659.85x = 12,993.35 × 4,219.83
  4. Step 4: Simplify right side
    8,659.85x = 54,829,707.03
  5. Step 5: Solve for x
    x = 54,829,707.03/8,659.85
  6. Step 6: Final answer
    x = 6,331.49

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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.