Home / 11,725.97-16,181.78-6,420.74

Finding the Fourth Proportional to 11,725.97, 16,181.78 and 6,420.74

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Solution

The fourth proportional to 11,725.97, 16,181.78 and 6,420.74 is: 8,860.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,725.97 : 16,181.78 = 6,420.74 : x
  2. Step 2: Convert to fraction form
    11,725.97/16,181.78 = 6,420.74/x
  3. Step 3: Cross multiply
    11,725.97x = 16,181.78 × 6,420.74
  4. Step 4: Simplify right side
    11,725.97x = 103,898,889.10
  5. Step 5: Solve for x
    x = 103,898,889.10/11,725.97
  6. Step 6: Final answer
    x = 8,860.58

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Double scale
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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.