Home / 29,112.90-40,145.67-21,579.90

Finding the Fourth Proportional to 29,112.90, 40,145.67 and 21,579.90

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Solution

The fourth proportional to 29,112.90, 40,145.67 and 21,579.90 is: 29,757.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,112.90 : 40,145.67 = 21,579.90 : x
  2. Step 2: Convert to fraction form
    29,112.90/40,145.67 = 21,579.90/x
  3. Step 3: Cross multiply
    29,112.90x = 40,145.67 × 21,579.90
  4. Step 4: Simplify right side
    29,112.90x = 866,339,544.03
  5. Step 5: Solve for x
    x = 866,339,544.03/29,112.90
  6. Step 6: Final answer
    x = 29,757.93

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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.