Home / 39,626.82-54,685.69-21,720.68

Finding the Fourth Proportional to 39,626.82, 54,685.69 and 21,720.68

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Solution

The fourth proportional to 39,626.82, 54,685.69 and 21,720.68 is: 29,974.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,626.82 : 54,685.69 = 21,720.68 : x
  2. Step 2: Convert to fraction form
    39,626.82/54,685.69 = 21,720.68/x
  3. Step 3: Cross multiply
    39,626.82x = 54,685.69 × 21,720.68
  4. Step 4: Simplify right side
    39,626.82x = 1,187,810,373.07
  5. Step 5: Solve for x
    x = 1,187,810,373.07/39,626.82
  6. Step 6: Final answer
    x = 29,974.91

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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.