Home / 39,623.81-54,682.21-21,718.81

Finding the Fourth Proportional to 39,623.81, 54,682.21 and 21,718.81

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Solution

The fourth proportional to 39,623.81, 54,682.21 and 21,718.81 is: 29,972.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,623.81 : 54,682.21 = 21,718.81 : x
  2. Step 2: Convert to fraction form
    39,623.81/54,682.21 = 21,718.81/x
  3. Step 3: Cross multiply
    39,623.81x = 54,682.21 × 21,718.81
  4. Step 4: Simplify right side
    39,623.81x = 1,187,632,624.87
  5. Step 5: Solve for x
    x = 1,187,632,624.87/39,623.81
  6. Step 6: Final answer
    x = 29,972.71

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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.