Home / 39,213.77-54,115.33-21,308.78

Finding the Fourth Proportional to 39,213.77, 54,115.33 and 21,308.78

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Solution

The fourth proportional to 39,213.77, 54,115.33 and 21,308.78 is: 29,406.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,213.77 : 54,115.33 = 21,308.78 : x
  2. Step 2: Convert to fraction form
    39,213.77/54,115.33 = 21,308.78/x
  3. Step 3: Cross multiply
    39,213.77x = 54,115.33 × 21,308.78
  4. Step 4: Simplify right side
    39,213.77x = 1,153,131,391.02
  5. Step 5: Solve for x
    x = 1,153,131,391.02/39,213.77
  6. Step 6: Final answer
    x = 29,406.29

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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.