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Finding the Fourth Proportional to 17,739.20, 26,612.40 and 8,379.20

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Solution

The fourth proportional to 17,739.20, 26,612.40 and 8,379.20 is: 12,570.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,739.20 : 26,612.40 = 8,379.20 : x
  2. Step 2: Convert to fraction form
    17,739.20/26,612.40 = 8,379.20/x
  3. Step 3: Cross multiply
    17,739.20x = 26,612.40 × 8,379.20
  4. Step 4: Simplify right side
    17,739.20x = 222,990,622.08
  5. Step 5: Solve for x
    x = 222,990,622.08/17,739.20
  6. Step 6: Final answer
    x = 12,570.50

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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.