Home / 39,685.87-54,767.15-21,782.54

Finding the Fourth Proportional to 39,685.87, 54,767.15 and 21,782.54

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Solution

The fourth proportional to 39,685.87, 54,767.15 and 21,782.54 is: 30,060.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,685.87 : 54,767.15 = 21,782.54 : x
  2. Step 2: Convert to fraction form
    39,685.87/54,767.15 = 21,782.54/x
  3. Step 3: Cross multiply
    39,685.87x = 54,767.15 × 21,782.54
  4. Step 4: Simplify right side
    39,685.87x = 1,192,967,526.65
  5. Step 5: Solve for x
    x = 1,192,967,526.65/39,685.87
  6. Step 6: Final answer
    x = 30,060.26

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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.