Home / 39,385.22-54,351.61-21,480.23

Finding the Fourth Proportional to 39,385.22, 54,351.61 and 21,480.23

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Solution

The fourth proportional to 39,385.22, 54,351.61 and 21,480.23 is: 29,642.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,385.22 : 54,351.61 = 21,480.23 : x
  2. Step 2: Convert to fraction form
    39,385.22/54,351.61 = 21,480.23/x
  3. Step 3: Cross multiply
    39,385.22x = 54,351.61 × 21,480.23
  4. Step 4: Simplify right side
    39,385.22x = 1,167,484,835.69
  5. Step 5: Solve for x
    x = 1,167,484,835.69/39,385.22
  6. Step 6: Final answer
    x = 29,642.71

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Double scale
Find fourth proportional to 39,386.22, 54,352.99 and 21,481.23
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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.