Home / 3,929.10-5,905.80-3,856.20

Finding the Fourth Proportional to 3,929.10, 5,905.80 and 3,856.20

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Solution

The fourth proportional to 3,929.10, 5,905.80 and 3,856.20 is: 5,796.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.10 : 5,905.80 = 3,856.20 : x
  2. Step 2: Convert to fraction form
    3,929.10/5,905.80 = 3,856.20/x
  3. Step 3: Cross multiply
    3,929.10x = 5,905.80 × 3,856.20
  4. Step 4: Simplify right side
    3,929.10x = 22,773,945.96
  5. Step 5: Solve for x
    x = 22,773,945.96/3,929.10
  6. Step 6: Final answer
    x = 5,796.22

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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.