Home / 39,220.91-54,122.61-21,315.77

Finding the Fourth Proportional to 39,220.91, 54,122.61 and 21,315.77

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Solution

The fourth proportional to 39,220.91, 54,122.61 and 21,315.77 is: 29,414.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,220.91 : 54,122.61 = 21,315.77 : x
  2. Step 2: Convert to fraction form
    39,220.91/54,122.61 = 21,315.77/x
  3. Step 3: Cross multiply
    39,220.91x = 54,122.61 × 21,315.77
  4. Step 4: Simplify right side
    39,220.91x = 1,153,665,106.56
  5. Step 5: Solve for x
    x = 1,153,665,106.56/39,220.91
  6. Step 6: Final answer
    x = 29,414.54

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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.