Home / 10,739.20-16,108.80-8,147.20

Finding the Fourth Proportional to 10,739.20, 16,108.80 and 8,147.20

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Solution

The fourth proportional to 10,739.20, 16,108.80 and 8,147.20 is: 12,220.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,739.20 : 16,108.80 = 8,147.20 : x
  2. Step 2: Convert to fraction form
    10,739.20/16,108.80 = 8,147.20/x
  3. Step 3: Cross multiply
    10,739.20x = 16,108.80 × 8,147.20
  4. Step 4: Simplify right side
    10,739.20x = 131,241,615.36
  5. Step 5: Solve for x
    x = 131,241,615.36/10,739.20
  6. Step 6: Final answer
    x = 12,220.80

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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.