Home / 19,790.20-29,685.30-8,111.80

Finding the Fourth Proportional to 19,790.20, 29,685.30 and 8,111.80

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Solution

The fourth proportional to 19,790.20, 29,685.30 and 8,111.80 is: 12,167.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.20 : 29,685.30 = 8,111.80 : x
  2. Step 2: Convert to fraction form
    19,790.20/29,685.30 = 8,111.80/x
  3. Step 3: Cross multiply
    19,790.20x = 29,685.30 × 8,111.80
  4. Step 4: Simplify right side
    19,790.20x = 240,801,216.54
  5. Step 5: Solve for x
    x = 240,801,216.54/19,790.20
  6. Step 6: Final answer
    x = 12,167.70

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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.