Home / 39,721.55-54,815.76-21,817.44

Finding the Fourth Proportional to 39,721.55, 54,815.76 and 21,817.44

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Solution

The fourth proportional to 39,721.55, 54,815.76 and 21,817.44 is: 30,108.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.55 : 54,815.76 = 21,817.44 : x
  2. Step 2: Convert to fraction form
    39,721.55/54,815.76 = 21,817.44/x
  3. Step 3: Cross multiply
    39,721.55x = 54,815.76 × 21,817.44
  4. Step 4: Simplify right side
    39,721.55x = 1,195,939,554.85
  5. Step 5: Solve for x
    x = 1,195,939,554.85/39,721.55
  6. Step 6: Final answer
    x = 30,108.08

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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.