Home / 39,145.75-54,019.56-21,240.07

Finding the Fourth Proportional to 39,145.75, 54,019.56 and 21,240.07

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Solution

The fourth proportional to 39,145.75, 54,019.56 and 21,240.07 is: 29,310.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,145.75 : 54,019.56 = 21,240.07 : x
  2. Step 2: Convert to fraction form
    39,145.75/54,019.56 = 21,240.07/x
  3. Step 3: Cross multiply
    39,145.75x = 54,019.56 × 21,240.07
  4. Step 4: Simplify right side
    39,145.75x = 1,147,379,235.77
  5. Step 5: Solve for x
    x = 1,147,379,235.77/39,145.75
  6. Step 6: Final answer
    x = 29,310.44

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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.