Home / 3,929.24-5,887.98-1,979

Finding the Fourth Proportional to 3,929.24, 5,887.98 and 1,979

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Solution

The fourth proportional to 3,929.24, 5,887.98 and 1,979 is: 2,965.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.24 : 5,887.98 = 1,979 : x
  2. Step 2: Convert to fraction form
    3,929.24/5,887.98 = 1,979/x
  3. Step 3: Cross multiply
    3,929.24x = 5,887.98 × 1,979
  4. Step 4: Simplify right side
    3,929.24x = 11,652,312.42
  5. Step 5: Solve for x
    x = 11,652,312.42/3,929.24
  6. Step 6: Final answer
    x = 2,965.54

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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.