Home / 39,220.68-54,123.78-21,315.36

Finding the Fourth Proportional to 39,220.68, 54,123.78 and 21,315.36

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Solution

The fourth proportional to 39,220.68, 54,123.78 and 21,315.36 is: 29,414.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,220.68 : 54,123.78 = 21,315.36 : x
  2. Step 2: Convert to fraction form
    39,220.68/54,123.78 = 21,315.36/x
  3. Step 3: Cross multiply
    39,220.68x = 54,123.78 × 21,315.36
  4. Step 4: Simplify right side
    39,220.68x = 1,153,667,855.26
  5. Step 5: Solve for x
    x = 1,153,667,855.26/39,220.68
  6. Step 6: Final answer
    x = 29,414.78

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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.