Home / 11,725.57-16,181.28-6,420.39

Finding the Fourth Proportional to 11,725.57, 16,181.28 and 6,420.39

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Solution

The fourth proportional to 11,725.57, 16,181.28 and 6,420.39 is: 8,860.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,725.57 : 16,181.28 = 6,420.39 : x
  2. Step 2: Convert to fraction form
    11,725.57/16,181.28 = 6,420.39/x
  3. Step 3: Cross multiply
    11,725.57x = 16,181.28 × 6,420.39
  4. Step 4: Simplify right side
    11,725.57x = 103,890,128.30
  5. Step 5: Solve for x
    x = 103,890,128.30/11,725.57
  6. Step 6: Final answer
    x = 8,860.13

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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.