Home / 19,917.40-29,886.90-8,231.80

Finding the Fourth Proportional to 19,917.40, 29,886.90 and 8,231.80

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Solution

The fourth proportional to 19,917.40, 29,886.90 and 8,231.80 is: 12,352.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.40 : 29,886.90 = 8,231.80 : x
  2. Step 2: Convert to fraction form
    19,917.40/29,886.90 = 8,231.80/x
  3. Step 3: Cross multiply
    19,917.40x = 29,886.90 × 8,231.80
  4. Step 4: Simplify right side
    19,917.40x = 246,022,983.42
  5. Step 5: Solve for x
    x = 246,022,983.42/19,917.40
  6. Step 6: Final answer
    x = 12,352.16

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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.