Home / 39,145.10-54,018.75-21,239.73

Finding the Fourth Proportional to 39,145.10, 54,018.75 and 21,239.73

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Solution

The fourth proportional to 39,145.10, 54,018.75 and 21,239.73 is: 29,310.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,145.10 : 54,018.75 = 21,239.73 : x
  2. Step 2: Convert to fraction form
    39,145.10/54,018.75 = 21,239.73/x
  3. Step 3: Cross multiply
    39,145.10x = 54,018.75 × 21,239.73
  4. Step 4: Simplify right side
    39,145.10x = 1,147,343,744.59
  5. Step 5: Solve for x
    x = 1,147,343,744.59/39,145.10
  6. Step 6: Final answer
    x = 29,310.03

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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.