Home / 39,721.33-54,816.10-21,817.99

Finding the Fourth Proportional to 39,721.33, 54,816.10 and 21,817.99

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Solution

The fourth proportional to 39,721.33, 54,816.10 and 21,817.99 is: 30,109.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.33 : 54,816.10 = 21,817.99 : x
  2. Step 2: Convert to fraction form
    39,721.33/54,816.10 = 21,817.99/x
  3. Step 3: Cross multiply
    39,721.33x = 54,816.10 × 21,817.99
  4. Step 4: Simplify right side
    39,721.33x = 1,195,977,012.55
  5. Step 5: Solve for x
    x = 1,195,977,012.55/39,721.33
  6. Step 6: Final answer
    x = 30,109.19

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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.