Home / 12,108.80-16,708.20-6,803.60

Finding the Fourth Proportional to 12,108.80, 16,708.20 and 6,803.60

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Solution

The fourth proportional to 12,108.80, 16,708.20 and 6,803.60 is: 9,387.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.80 : 16,708.20 = 6,803.60 : x
  2. Step 2: Convert to fraction form
    12,108.80/16,708.20 = 6,803.60/x
  3. Step 3: Cross multiply
    12,108.80x = 16,708.20 × 6,803.60
  4. Step 4: Simplify right side
    12,108.80x = 113,675,909.52
  5. Step 5: Solve for x
    x = 113,675,909.52/12,108.80
  6. Step 6: Final answer
    x = 9,387.88

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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.